John Breckinridge was an American lawyer, slave-owning planter, soldier, and politician in Virginia and Kentucky. He served several terms each in both state's legislatures before legislators elected him to the U.S. Senate. He also served as United States Attorney General during the second term of President Thomas Jefferson. He is the progenitor of Kentucky's Breckinridge political family and the namesake of Breckinridge County, Kentucky.

The United States attorney general (AG) is the head of the United States Department of Justice, and is the chief law enforcement officer of the federal government of the United States. The attorney general serves as the principal advisor to the president of the United States on all legal matters. The attorney general is a statutory member of the Cabinet of the United States.