Sen. Max Baucus (D-Mont.) announced Tuesday that he won't seek reelection in 2014 after six terms in the upper chamber.
Baucus, who serves as the Senate Finance Committee chairman, has distinguished himself from fellow Democrats by aligning time and again with the conservative positions of the GOP. Most recently, he was one of only four Democrats to oppose gun background check legislation on the Senate floor.
Click through some of Baucus' most memorable moments from his years in the Senate: