Horse Play

Protestors participate in a 'March For America' demonstration calling for immigration reform near the Washington Monument March 21, 2010 in Washington, DC.

On the eve of the second presidential debate, John Heilemann, national affairs editor for New York Magazine, talks about the presidential race and his cover story about the Clintons' role in politics today. Plus: 30 issues in 30 days continues with a look at the country’s divide on immigration policy; the growing epidemic of concussions in kids sports; and a call-in to participate in a mock presidential debate role-play.