Tracking the GOP race to 2012

Sarah Palin placed an op-ed on cap-and-trade in The Washington Post, and got blasted by liberal bloggers; Congressional Quarterly reported on mounting speculation that Reps. Eric Cantor and Mike Pence will run in 2012; and Sen. John Ensign, formerly speculated as a 2012 presidential hopeful, says he'll run for reelection to the Senate in that year.