A Chronicle of the '34 Days That Decided' the 2012 Election

Aired: 12/31/2012 | 0:08:29 | Clip
When the Obama campaign decided to spend big on ads early in the presidential race, it was a risky strategy. And it helped lead to Obama's re-election. Margaret Warner talks to Politico's Jonathan Martin and Gleen Thrush about their latest e-book, "The End of the Line": Romney vs. Obama: The 34 Days That Decided the Election."