United States
Forty-eight of the fifty states and the federal district are contiguous and located in North America between Canada and Mexico. The state of Alaska is in the northwest corner of North America, bordered by Canada to the east, the state of Hawaii is an archipelago in the mid-Pacific Ocean. The U. S. territories are scattered about the Pacific Ocean, the geography and wildlife of the country are extremely diverse. At 3.8 million square miles and with over 324 million people, the United States is the worlds third- or fourth-largest country by area, third-largest by land area. It is one of the worlds most ethnically diverse and multicultural nations, paleo-Indians migrated from Asia to the North American mainland at least 15,000 years ago. European colonization began in the 16th century, the United States emerged from 13 British colonies along the East Coast. Numerous disputes between Great Britain and the following the Seven Years War led to the American Revolution. On July 4,1776, during the course of the American Revolutionary War, the war ended in 1783 with recognition of the independence of the United States by Great Britain, representing the first successful war of independence against a European power.
The current constitution was adopted in 1788, after the Articles of Confederation, the first ten amendments, collectively named the Bill of Rights, were ratified in 1791 and designed to guarantee many fundamental civil liberties. During the second half of the 19th century, the American Civil War led to the end of slavery in the country. By the end of century, the United States extended into the Pacific Ocean. The Spanish–American War and World War I confirmed the status as a global military power. The end of the Cold War and the dissolution of the Soviet Union in 1991 left the United States as the sole superpower. The U. S. is a member of the United Nations, World Bank, International Monetary Fund, Organization of American States. The United States is a developed country, with the worlds largest economy by nominal GDP. It ranks highly in several measures of performance, including average wage, human development, per capita GDP. While the U. S. economy is considered post-industrial, characterized by the dominance of services and knowledge economy, the United States is a prominent political and cultural force internationally, and a leader in scientific research and technological innovations.
In 1507, the German cartographer Martin Waldseemüller produced a map on which he named the lands of the Western Hemisphere America after the Italian explorer and cartographer Amerigo Vespucci
National Wilderness Preservation System
The National Wilderness Preservation System of the United States protects federally managed wilderness areas designated for preservation in their natural condition. Activity on formally designated wilderness areas is coordinated by the National Wilderness Preservation System. Wilderness areas are managed by four federal land management agencies, the National Park Service, the U. S. Forest Service, the U. S. Fish and Wildlife Service, and the Bureau of Land Management. As of 2015, there are 765 designated wilderness areas, totaling 109,129,657 acres, during the 1950s and 1960s, as the American transportation system was on the rise, concern for clean air and water quality began to grow. A conservation movement began to place with the intent of establishing designated wilderness areas. Howard Zahniser created the first draft of the Wilderness Act in 1956 and it took nine years and 65 rewrites before the Wilderness Act was finally passed in 1964. The Wilderness Act of 1964, which established the NWPS, was signed into law by President Lyndon B.
Johnson on September 3,1964, the first national forest wilderness areas were established by the Wilderness Act itself. The Great Swamp in New Jersey became the first National Wildlife Refuge with formally designated wilderness in 1968, Wilderness areas in national parks followed, beginning with the designation of wilderness in part of Craters of the Moon National Monument in Idaho in 1970. A smaller spike in 1984 came with the passage of many bills establishing national forest wilderness areas identified by the Forest Services Roadless Area Review and Evaluation process. Over 200 wilderness areas have been created within Bureau of Land Management administered lands since then, as of August 2008, a total of 704 separate wilderness areas, encompassing 107,514,938 acres, had become part of the National Wilderness Preservation System. With the passage of the Omnibus Public Lands Act in March 2009, as of September 2015, the system includes 765 wilderness areas totaling 109,129,657 acres. On federal lands in the United States, Congress may designate an area as wilderness under the provisions of the Wilderness Act of 1964.
Congress reviews these cases on a state by state basis and determines which areas, there have been multiple occasions in which congress designated more federal land than had been recommended by the nominating agency. The Wilderness Act provides criteria for lands being considered for wilderness designation, Wilderness areas are subject to specific management restrictions, human activities are limited to non-motorized recreation, scientific research, and other non-invasive activities. During these activities, patrons are asked to abide by the Leave No Trace policy and this policy sets guidelines for using the wilderness responsibly, and leaving the area as it was before usage. When closely observed, the Leave No Trace ethos ensures that wilderness areas remain untainted by human interaction, Wilderness areas fall into IUCN protected area management category Ia or Ib. Wilderness areas are parts of parks, wildlife refuges, national forests. Initially, the NWPS included 34 areas protecting 9.1 million acres in the national forests, there are 762 wilderness areas in the NWPS, preserving 108,916,684 acres
President of the United States
The President of the United States is the head of state and head of government of the United States. The president directs the executive branch of the government and is the commander-in-chief of the United States Armed Forces. The president is considered to be one of the worlds most powerful political figures, the role includes being the commander-in-chief of the worlds most expensive military with the second largest nuclear arsenal and leading the nation with the largest economy by nominal GDP. The office of President holds significant hard and soft power both in the United States and abroad, Constitution vests the executive power of the United States in the president. The president is empowered to grant federal pardons and reprieves. The president is responsible for dictating the legislative agenda of the party to which the president is a member. The president directs the foreign and domestic policy of the United States, since the office of President was established in 1789, its power has grown substantially, as has the power of the federal government as a whole.
However, nine vice presidents have assumed the presidency without having elected to the office. The Twenty-second Amendment prohibits anyone from being elected president for a third term, in all,44 individuals have served 45 presidencies spanning 57 full four-year terms. On January 20,2017, Donald Trump was sworn in as the 45th, in 1776, the Thirteen Colonies, acting through the Second Continental Congress, declared political independence from Great Britain during the American Revolution. The new states, though independent of each other as nation states, desiring to avoid anything that remotely resembled a monarchy, Congress negotiated the Articles of Confederation to establish a weak alliance between the states. Out from under any monarchy, the states assigned some formerly royal prerogatives to Congress, only after all the states agreed to a resolution settling competing western land claims did the Articles take effect on March 1,1781, when Maryland became the final state to ratify them.
In 1783, the Treaty of Paris secured independence for each of the former colonies, with peace at hand, the states each turned toward their own internal affairs. Prospects for the convention appeared bleak until James Madison and Edmund Randolph succeeded in securing George Washingtons attendance to Philadelphia as a delegate for Virginia. It was through the negotiations at Philadelphia that the presidency framed in the U. S. The first power the Constitution confers upon the president is the veto, the Presentment Clause requires any bill passed by Congress to be presented to the president before it can become law. Once the legislation has been presented, the president has three options, Sign the legislation, the bill becomes law. Veto the legislation and return it to Congress, expressing any objections, in this instance, the president neither signs nor vetoes the legislation
Drainage basin
A drainage basin or catchment area is any area of land where precipitation collects and drains off into a common outlet, such as into a river, bay, or other body of water. Drainage basins connect into other drainage basins at elevations in a hierarchical pattern, with smaller sub-drainage basins. Other terms used to describe drainage basins are catchment, catchment basin, drainage area, river basin and water basin. In closed drainage basins the water converges to a point inside the basin, known as a sink, which may be a permanent lake. The drainage basin acts as a funnel by collecting all the water within the covered by the basin. Each drainage basin is separated topographically from adjacent basins by a perimeter, drainage basins are similar but not identical to hydrologic units, which are drainage areas delineated so as to nest into a multi-level hierarchical drainage system. Hydrologic units are defined to allow multiple inlets, outlets, or sinks, in a strict sense, all drainage basins are hydrologic units but not all hydrologic units are drainage basins.
Drainage basins of the oceans and seas of the world. Grey areas are endorheic basins that do not drain to the oceans, the following is a list of the major ocean basins, About 48. 7% of the worlds land drains to the Atlantic Ocean. The two major mediterranean seas of the world flow to the Atlantic, The Caribbean Sea and Gulf of Mexico basin includes most of the U. S. The Mediterranean Sea basin includes much of North Africa, east-central Africa, Southern and Eastern Europe and the areas of Israel, Lebanon. Just over 13% of the land in the world drains to the Pacific Ocean, the Indian Oceans drainage basin comprises about 13% of Earths land. It drains the eastern coast of Africa, the coasts of the Red Sea and the Persian Gulf, the Indian subcontinent, antarctica comprises approximately eight percent of the Earths land. The five largest river basins, from largest to smallest, are the basins of the Amazon, the Río de la Plata, the Congo, the Nile, and the Mississippi. The three rivers that drain the most water, from most to least, are the Amazon, endorheic drainage basins are inland basins that do not drain to an ocean.
Around 18% of all land drains to endorheic lakes or seas or sinks, the largest of these consists of much of the interior of Asia, which drains into the Caspian Sea, the Aral Sea, and numerous smaller lakes. Some of these, such as the Great Basin, are not single drainage basins but collections of separate, in endorheic bodies of standing water where evaporation is the primary means of water loss, the water is typically more saline than the oceans. An extreme example of this is the Dead Sea, drainage basins have been historically important for determining territorial boundaries, particularly in regions where trade by water has been important
United States Secretary of the Interior
The United States Secretary of the Interior is the head of the U. S. Department of the Interior. The Secretary serves on and appoints the private citizens on the National Park Foundation board, the Secretary is a member of the Presidents Cabinet. The U. S. Department of the Interior should not be confused with the Ministries of the Interior as used in other countries. Ministries of the Interior in these other countries correspond primarily to the Department of Homeland Security in the U. S, Cabinet and secondarily to the Department of Justice. On December 13,2016, President-elect Donald Trump picked Ryan Zinke for the position of Interior Secretary, the most recent to die was William P. Clark, Jr. on August 10,2013. List of Secretaries of the Interior List of Secretaries of the Interior The Department of Everything Else, Highlights of Interior History
Smithsonian Institution
The Smithsonian Institution, established in 1846 for the increase and diffusion of knowledge, is a group of museums and research centers administered by the Government of the United States. Originally organized as the United States National Museum, that ceased to exist as an administrative entity in 1967. Additional facilities are located in Arizona, Massachusetts, New York City, Virginia, more than 200 institutions and museums in 45 states, Puerto Rico, and Panama are Smithsonian Affiliates. The Institutions thirty million annual visitors are admitted without charge and its annual budget is around $1.2 billion with 2/3 coming from annual federal appropriations. Other funding comes from the Institutions endowment and corporate contributions, membership dues, and earned retail, Institution publications include Smithsonian and Air & Space magazines. The British scientist James Smithson left most of his wealth to his nephew Henry James Hungerford, Congress officially accepted the legacy bequeathed to the nation, and pledged the faith of the United States to the charitable trust on July 1,1836.
The American diplomat Richard Rush was dispatched to England by President Andrew Jackson to collect the bequest, Rush returned in August 1838 with 105 sacks containing 104,960 gold sovereigns. Once the money was in hand, eight years of Congressional haggling ensued over how to interpret Smithsons rather vague mandate for the increase, the money was invested by the US Treasury in bonds issued by the state of Arkansas which soon defaulted. The United States Exploring Expedition by the U. S. Navy circumnavigated the globe between 1838 and 1842, in 1846, the regents developed a plan for weather observation, in 1847, money was appropriated for meteorological research. The Institution became a magnet for young scientists from 1857 to 1866, the Smithsonian played a critical role as the U. S. partner institution in early bilateral scientific exchanges with the Academy of Sciences of Cuba. The Smithsonian Institution Building began construction in 1849, designed by architect James Renwick Jr. its interiors were completed by general contract Gilbert Cameron and the building opened in 1855.
The Smithsonians first expansion came with construction of the Arts and Industries Building in 1881, Congress had promised to build a new structure for the museum if the 1876 Philadelphia Centennial Exposition generated enough income. It did, and the building was designed by architects Adolf Cluss and Paul Schulze, meigs of the United States Army Corps of Engineers. The National Zoological Park opened in 1889 to accommodate the Smithsonians Department of Living Animals and this structure was designed by the D. C. architectural firm of Hornblower & Marshall. More than 40 years would pass before the museum, the Museum of History. It was designed by the firm of McKim, Mead & White. That same year, the Smithsonian signed an agreement to take over the Cooper Union Museum for the Arts of Decoration, the National Portrait Gallery and the Smithsonian American Art Museum opened in the Old Patent Office Building on October 7,1968. The first new building to open since the National Museum of Natural History was the Hirshhorn Museum and Sculpture Garden
United States Code
The Code of Laws of the United States of America is the official compilation and codification of the general and permanent federal statutes of the United States. It contains 52 titles, and a further three titles have been proposed, the main edition is published every six years by the Office of the Law Revision Counsel of the House of Representatives, and cumulative supplements are published annually. The official version of those laws not codified in the United States Code can be found in United States Statutes at Large, the official text of an Act of Congress is that of the enrolled bill presented to the President for his signature or disapproval. Upon enactment of a law, the bill is delivered to the Office of the Federal Register within the National Archives. After authorization from the OFR, copies are distributed as slip laws by the Government Printing Office, the Archivist assembles annual volumes of the enacted laws and publishes them as the United States Statutes at Large. By law, the text of the Statutes at Large is legal evidence of the laws enacted by Congress, slip laws are competent evidence.
The Statutes at Large, however, is not a convenient tool for legal research and it is arranged strictly in chronological order so that statutes addressing related topics may be scattered across many volumes. Statutes often repeal or amend laws, and extensive cross-referencing is required to determine what laws are in force at any given time. The United States Code is the result of an effort to make finding relevant and effective statutes simpler by reorganizing them by subject matter, the Code is maintained by the Office of the Law Revision Counsel of the U. S. House of Representatives. The LRC updates the Code accordingly, because of this codification approach, a single named statute may or may not appear in a single place in the Code. Often, complex legislation bundles a series of provisions together as a means of addressing a social or governmental problem, for example, an Act providing relief for family farms might affect items in Title 7, Title 26, and Title 43. When the Act is codified, its various provisions might well be placed in different parts of those various Titles, the individual sections of a statute are incorporated into the Code exactly as enacted, sometimes editorial changes are made by the LRC.
Though authorized by statute, these changes do not constitute positive law, the authority for the material in the United States Code comes from its enactment through the legislative process and not from its presentation in the Code. For example, the United States Code omitted 12 U. S. C. §92 for decades, apparently because it was thought to have been repealed. In its 1993 ruling in U. S. National Bank of Oregon v. Independent Insurance Agents of America, by law, those titles of the United States Code that have not been enacted into positive law are prima facie evidence of the law in effect. The United States Statutes at Large remains the ultimate authority, if a dispute arises as to the accuracy or completeness of the codification of an unenacted title, the courts will turn to the language in the United States Statutes at Large. This process makes that title of the United States Code legal evidence of the law in force, where a title has been enacted into positive law, a court may neither permit nor require proof of the underlying original Acts of Congress.
The distinction between enacted and unenacted titles is largely academic because the Code is nearly always accurate, the United States Code is routinely cited by the Supreme Court and other federal courts without mentioning this theoretical caveat
88th United States Congress
The apportionment of seats in this House of Representatives was based on the Eighteenth Census of the United States in 1960, and the number of members was again 435. Both chambers had a Democratic majority, november 22,1963, Lyndon Johnson became President of the United States on the death of President John Kennedy. March 30 – June 10,1964, The longest filibuster in the history of the Senate was waged against the Civil Rights Act of 1964, with 57 days of debate over a 73-day period. It ended when the Senate voted 71–29 to invoke cloture, with the carried out by southern members of the Democratic Party. August 2–4,1964, Gulf of Tonkin Incident June 10,1963, Equal Pay Act, 88–38 October 17,1963, Department of Defense Appropriations Act, Pub. L. 88–149 October 31,1963, Community Mental Health Centers Act, 88–164, title II, including Mental Retardation Facilities Construction Act December 17,1963, Clean Air Act, Pub. L. 88–206 July 2,1964, Civil Rights Act of 1964, 88–352 July 9,1964, Urban Mass Transportation Act of 1964, Pub. L.
88–365 August 7,1964, Tonkin Gulf Resolution, Pub. L, 88–408 August 20,1964, Economic Opportunity Act of 1964, Pub. L. 88–452 August 31,1964, Food Stamp Act of 1964, 88–525 September 3,1964, Wilderness Act, Pub. L. 88–577 September 4,1964, Nurse Training Act, Pub. L, senators are ordered first by state, and by seniority. Harrison Chaplain, Frederick Brown Harris, Methodist Parliamentarian, Charles Watkins Floyd Riddick Secretary, Felton McLellan Johnston Sergeant at Arms, Joseph C. Duke Clerk, Ralph R. Roberts Doorkeeper, William Mosley Fishbait Miller Parliamentarian, Lewis Deschler Postmaster, H. H. Morris Sergeant at Arms, Zeake W. Johnson, Senate history Party Division in the Senate, 1789-Present House of Representatives Session Calendar for the 88th Congress. Official Congressional Directory for the 88th Congress, 1st Session, official Congressional Directory for the 88th Congress, 2nd Session. Pocket Congressional Directory for the 88th Congress
National Park Service
It was created on August 25,1916, by Congress through the National Park Service Organic Act and is an agency of the United States Department of the Interior. As of 2014, the NPS employs 21,651 employees who oversee 417 units, the National Park Service celebrated its centennial in 2016. National parks and national monuments in the United States were originally individually managed under the auspices of the Department of the Interior, the movement for an independent agency to oversee these federal lands was spearheaded by business magnate and conservationist Stephen Mather, as well as J. Horace McFarland. With the help of journalist Robert Sterling Yard, Mather ran a publicity campaign for the Department of the Interior and they wrote numerous articles that praised the scenic and historic qualities of the parks and their possibilities for educational and recreational benefits. This campaign resulted in the creation of a National Park Service, Mather became the first director of the newly formed NPS.
On March 3,1933, President Herbert Hoover signed the Reorganization Act of 1933, the act would allow the President to reorganize the executive branch of the United States government. It wasnt until that summer when the new President, Franklin D. Roosevelt, President Roosevelt agreed and issued two Executive orders to make it happen. In 1951, Conrad Wirth became director of the National Park Service, the demand for parks after the end of the World War II had left the parks overburdened with demands that could not be met. In 1952, with the support of President Dwight D. Eisenhower, he began Mission 66, New parks were added to preserve unique resources and existing park facilities were upgraded and expanded. In 1966, as the Park Service turned 50 years old, emphasis began to turn from just saving great and wonderful scenery, Director George Hartzog began the process with the creation of the National Lakeshores and National Recreation Areas. Since its inception in 1916, the National Park Service has managed each of the United States national parks, Yellowstone National Park was the first national park in the United States.
In 1872, there was no government to manage it. Yosemite National Park began as a park, the land for the park was donated by the federal government to the state of California in 1864 for perpetual conservation. Yosemite was returned to federal ownership, at first, each national park was managed independently, with varying degrees of success. In Yellowstone, the staff was replaced by the U. S. Army in 1886. Due to the irregularities in managing these national treasures, Stephen Mather petitioned the government to improve the situation. In response, Secretary of the Interior Franklin K. Lane challenged him to lobby for creating a new agency, Mather was successful with the ratification of the National Park Service Organic Act in 1916. Later, the agency was given authority over other protected areas, the National Park System includes all properties managed by the National Park Service
Habitat
A habitat is an ecological or environmental area that is inhabited by a particular species of animal, plant, or other type of organism. The term typically refers to the zone in which the organism lives and it is the natural environment in which an organism lives, or the physical environment that surrounds a species population. Every organism has certain habitat needs for the conditions in which it will thrive, habitat types include polar, temperate and tropical. The terrestrial vegetation type may be forest, grassland, the word habitat has been in use since about 1755 and derives from the Latin third-person singular present indicative of habitāre, to inhabit, from habēre, to have or to hold. Habitat can be defined as the environment of an organism. It is similar in meaning to a biotope, an area of environmental conditions associated with a particular community of plants. Generally speaking, animal communities are reliant on specific types of plant communities, some plants and animals are generalists, and their habitat requirements are met in a wide range of locations.
The small white butterfly for example is found on all the continents of the world apart from Antarctica and its larvae feed on a wide range of Brassicas and various other plant species, and it thrives in any open location with diverse plant associations. Disturbance is important in the creation of biodiverse habitats, in the absence of disturbance, a climax vegetation cover develops that prevents the establishment of other species. Lightning strikes and toppled trees in tropical forests allow species richness to be maintained as pioneering species move in to fill the gaps created. Similarly coastal habitats can become dominated by kelp until the seabed is disturbed by a storm, another cause of disturbance is when an area may be overwhelmed by an invasive introduced species which is not kept under control by natural enemies in its new habitat. Terrestrial habitat types include forests, grasslands and deserts, within these broad biomes are more specific habitats with varying climate types, temperature regimes, soils and vegetation types.
Many of these habitats grade into each other and each one has its own communities of plants. A habitat may suit a particular species well, but its presence or absence at any particular location depends to some extent on chance, on its dispersal abilities, freshwater habitats include rivers, lakes, ponds and bogs. Although some organisms are found across most of these habitats, the majority have more specific requirements, aquatic plants can be floating, semi-submerged, submerged or grow in permanently or temporarily saturated soils besides bodies of water. Marine habitats include brackish water, bays, the sea, the intertidal zone. Further variations include rock pools, sand banks, brackish lagoons and pebbly beaches, the benthic zone or seabed provides a home for both static organisms, anchored to the substrate, and for a large range of organisms crawling on or burrowing into the surface. A desert is not the kind of habitat that favours the presence of amphibians, with their requirement for water to keep their skins moist, some frogs live in deserts, creating moist habitats underground and hibernating while conditions are adverse
The Wilderness Society (United States)
The Wilderness Society is an American non-profit land conservation organization that is dedicated to protecting natural areas and federal public lands in the United States. They advocate for the designation of wilderness areas and other protective designations. They support balanced uses of lands, and advocate for federal politicians to enact various land conservation. It has active in fighting political efforts since the early 21st century to reduce protection for America’s lands. The organization was instrumental in the passage of the 1964 Wilderness Act and this created the National Wilderness Preservation System, which now protects nearly 110 million acres of U. S. public wildlands in all 50 states. As one of the largest conservationist organizations in the country, the Wilderness Society has contributed to all major designations of lands to be entered into the wilderness system. Virginia and Maryland, and Harold C, anderson, a leading member of the Potomac Appalachian Trail club. Yard became the Societys first secretary and the editor of its magazine, who was independently wealthy, made donations to finance the new organization.
In addition, he set up a trust through his estate to provide revenues to the Society. After he died in 1939 at age 38, The Wilderness Society began to receive such revenues, olaus Murie —biologist who joined the organizations governing council in 1937, and became president of the Society in 1950. Under Muries leadership, the Society lobbied successfully for the prevention of large dam projects near Glacier National Park. During his presidency, the Muries ranch in Moose, Mardy Murie —conservationist and Alaska advocate, former governing council member. In 1964, Mardy Murie attended the signing of the Wilderness Act by President Lyndon Johonson, the Wilderness Society has campaigned for the passage of wilderness bills as a means to permanently protect significant and unspoiled wildlands in the United States. Since the passage of the Wilderness Act in 1964, the National Wilderness Preservation System has grown to more than 109 million acres. One of The Wilderness Society’s specialties is creating coalitions consisting of groups, as well as representatives of sportsmen, scientists, business owners.
The Wilderness Society mobilizes public support for legislation that protects public lands through protective wildlands designations and this includes adding new wilderness areas and national monuments into U. S. public lands systems. Wilderness Designation The Wilderness Society supports legislation that protects unspoiled public lands as designated Wilderness, a wilderness designation is the highest form of protection the government can give to any public land. Under the Wilderness Act, designated areas are protected, from new development, commercial activities
United States House of Representatives
The United States House of Representatives is the lower chamber of the United States Congress which, along with the Senate, composes the legislature of the United States. The composition and powers of the House are established by Article One of the United States Constitution, since its inception in 1789, all representatives are elected popularly. The total number of voting representatives is fixed by law at 435, the House is charged with the passage of federal legislation, known as bills, after concurrence by the Senate, are sent to the President for consideration. The presiding officer is the Speaker of the House, who is elected by the members thereof and is traditionally the leader of the controlling party. He or she and other leaders are chosen by the Democratic Caucus or the Republican Conferences. The House meets in the wing of the United States Capitol. Under the Articles of Confederation, the Congress of the Confederation was a body in which each state was equally represented. All states except Rhode Island agreed to send delegates, the issue of how to structure Congress was one of the most divisive among the founders during the Convention.
The House is referred to as the house, with the Senate being the upper house. Both houses approval is necessary for the passage of legislation, the Virginia Plan drew the support of delegates from large states such as Virginia and Pennsylvania, as it called for representation based on population. The smaller states, favored the New Jersey Plan, the Constitution was ratified by the requisite number of states in 1788, but its implementation was set for March 4,1789. The House began work on April 1,1789, when it achieved a quorum for the first time, during the first half of the 19th century, the House was frequently in conflict with the Senate over regionally divisive issues, including slavery. The North was much more populous than the South, and therefore dominated the House of Representatives, the North held no such advantage in the Senate, where the equal representation of states prevailed. Regional conflict was most pronounced over the issue of slavery, One example of a provision repeatedly supported by the House but blocked by the Senate was the Wilmot Proviso, which sought to ban slavery in the land gained during the Mexican–American War.
Conflict over slavery and other issues persisted until the Civil War, the war culminated in the Souths defeat and in the abolition of slavery. Because all southern senators except Andrew Johnson resigned their seats at the beginning of the war, the years of Reconstruction that followed witnessed large majorities for the Republican Party, which many Americans associated with the Unions victory in the Civil War and the ending of slavery. The Reconstruction period ended in about 1877, the ensuing era, the Democratic and the Republican Party held majorities in the House at various times. The late 19th and early 20th centuries saw an increase in the power of the Speaker of the House
.svg)
