Super Tuesday is the United States presidential primary election day in February or March when the greatest number of U.S. states hold primary elections and caucuses. Approximately one-third of all delegates to the presidential nominating conventions can be won on Super Tuesday, more than on any other day. The results on Super Tuesday are therefore a strong indicator of the likely eventual presidential nominee of each political party.
Sign for a polling station in English, Spanish, Vietnamese and Chinese in Houston, Texas, 2016
United States presidential primary
Each of the 50 U.S. states, the District of Columbia, and territories of the United States holds either primary elections or caucuses to help nominate individual candidates for president of the United States. This process is designed to choose the candidates that will represent their political parties in the general election.
2016 presidential primary election ballots in Massachusetts
Voters checking in at a 2008 Washington State Democratic caucus held at the Nathan Eckstein Middle School in Seattle
A 2008 Washington state Democratic caucus held in the school lunchroom of Eckstein Middle School in Seattle. In some states like Washington, voters attend local meetings run by the parties instead of polling places to cast their selections.
A 2008 Democratic caucus meeting in Iowa City, Iowa. The Iowa caucuses are traditionally the first major electoral event of presidential primaries and caucuses.