Now-Sen. Jim Webb makes his way to the stage to speak to supporters in Tysons Corner, Va., on election night 2006. His too-close-to-call contest was decided two days later when then-Sen. George Allen (R) conceded to Webb, sealing a 51-seat Democratic majority in the Senate. Webb announced Wednesday that he will not seek a second term in 2012, when he would have faced a likely rematch with Allen.
Vice President Joe Biden waits to conduct a mock swearing-in ceremony with Sen. Brian Schatz, D-Hawaii, in the Capitol's Old Senate Chamber, December 2, 2014. Schatz was sworn in to serve the remainder of his term since he was appointed to the seat after Sen. Daniel Inouye, D-Hawaii, passed away.