2012 U.S. Senate race ... Virginia

From Chris Cillizza at the Washington Post:

5. Virginia (D): Kaine’s (somewhat) surprising decision to run means that the Commonwealth will play host to the marquee Senate race of the 2012 cycle. While former senator George Allen will have to run a primary campaign, the number of people running against him virtually ensures that the anti-Allen vote will be fractured so as to be ultimately meaningless. Both Kaine and Allen are well known entities in the state and will raise and spend millions. The question is what matters more to voters: Kaine’s support for President Obama as Democratic National Committee Chairman or Allen’s penchant for misstatements. (Previous ranking: 4)

And the field of Republican candidates just increased to five....