Iowa

Sen. Bernie Sanders won narrowly, but can he expand his base? Pete Buttigieg again did well, but in another largely white state. And the story of the night was Sen. Amy Klobuchar's third-place finish.

Iowa's results still aren't quite settled, but it's clear former South Bend, Ind., Mayor Pete Buttigieg and Vermont Sen. Bernie Sanders finished in what was essentially a tie. What does it all mean?

Multiple Iowa county chairs told NPR that there were malfunctions in a new app used by the state Democratic Party that delayed reporting. The party expects to report results later Tuesday.