'Collision 2012,' a Look at Forces That Shaped the Election

Aired: 8/8/2013 | 0:08:27 | Clip
Months after the re-election of President Barack Obama, Dan Balz of the Washington Post examines the 2012 election and aftermath in his new book "Collision 2012: Obama vs. Romney and the Future of Elections in America." Balz joins Gwen Ifill to discuss significant moments in each campaign and why it may shape elections to come.