Democrats draw battle lines in Iowa

In three weeks, Iowa Democrats will begin the party's process for selecting a nominee to take on Donald Trump in the general election. After more than a year of campaigning, it's almost time for actual voters to begin weighing in - and the race is still wide open.

Lil and Jarad Bernstein stood at the edge of the crowd gathered near the stage after a Pete Buttigieg rally in Des Moines on Sunday.

They were two of the several hundred who had turned out on a snowy evening to hear...