The latest on the Iowa caucuses

The Iowa caucuses are Tuesday, and in a nutshell, from Chris Cillizza at the Wash Post: Romney is the favorite, Santorum is picking up momentum, Ron Paul's base is at 15% and 19%, but he's having a hard time reliable going beyond that, and Gingrich, Perry and Bachmann are irrelevant (for now).

Romney has spent a lot of money recently in the state, so for him this is a must-win.  Ron Paul certainly is playing a spoiler role in various ways - to Romney, but also to the relevance of the caucuses themselves (if Paul wins, then maybe Iowa doesn't matter).  And Gingrich is waiting for South Carolina on January 21.

Next up after Iowa, New Hampshire on January 10.