Rethinking It

Republican presidential candidates participate in a Fox News, Wall Street Journal-sponsored debate.

New York Times columnist Gail Collins talk about whether Rick Perry’s departure or the revised Iowa Caucus results change anything about the Republican presidential race. Plus: Washington Post reporter Nia-Malika Henderson previews the South Carolina primary; teachers get a rebrand from Studio 360 and the designers at Hyperakt; City Council Member Letitia James weighs in on the paid sick leave and living wage bills; and Slate’s culture critic June Thomas discusses why we are so into the PBS show "Downton Abbey."