As the remaining GOP primary candidates slug it out in South Carolina tonight, be sure to follow TNR writers on Twitter for live analysis and commentary:
Jonathan Cohn: @CitizenCohn
Alec MacGillis: @AlecMacGillis
Noam Scheiber: @NoamScheiber
Walter Shapiro: @WalterShapiroPD
Matt O'Brien: @obsoletedogma
And, of course, the official TNR twitter feed: @TNR