William Wirt was an American author and statesman who is credited with turning the position of United States Attorney General into one of influence. He was the longest-serving attorney general in U.S. history. He was also the Anti-Masonic nominee for president in the 1832 election.

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.