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