The Changing Dynamics of the Iowa Caucuses and the Dominance of Donald Trump

We travel to cold, snowy Iowa, where Donald Trump dominates the polls, while his Republican rivals for the White House have been making their case for why they should be the GOP pick. Our host, Iowa native Christopher Walljasper, talks to voters on what's driving their decisions and Reuters political correspondents on why this caucus is unlike decisions of the past.

Learn more about your ad choices. Visit megaphone.fm/adchoices