Scott Brown, a Massachusetts Republican, was the only senator defeated for re-election on Nov. 6, tying a post-World War II record low of just one senator losing in the November general election.
Here are the five times in the 33 election years from 1946 to 2010 in which just one senator was beaten in the general election:
- 2004: Tom Daschle, a three-term South Dakota Democrat, the Senate minority leader and a former majority leader, lost to former Rep. John Thune.
- 1996: Larry Pressler, a three-term South Dakota Republican, fell to Rep. Tim Johnson.
- 1990: Rudy Boschwitz, a two-term Minnesota Republican, was defeated by Paul Wellstone, a political science professor.
- 1966: Paul Douglas, a three-term Illinois Democrat, lost to Chuck Percy, a business executive. (Percy’s son-in-law, Jay Rockefeller, is a Democratic senator from West Virginia.)
- 1960: J. Allen Frear, a two-term Delaware Democrat, was unseated by Gov. Caleb Boggs. (In 1972, Boggs was unseated by a 29-year-old Democratic lawyer named Joe Biden.)