How Donald Trump brought unpredictability to Iowa

Aired: 2/1/2016 | 0:08:24 | Clip
From on the ground in Iowa, Judy Woodruff talks to Amy Walter of The Cook Political Report and NPR’s Tamara Keith about that state’s broad support for Donald Trump, Sen. Ted Cruz’s ground game and strategy with religious voters, Hillary Clinton’s messaging about her track record and Sen. Bernie Sanders’ record-breaking number of campaign donations.