Martin O'Malley drops out of presidential race

"Iowa I challenge you to do what you've always done best," he said in the video. "I need your help. I want your vote."

O'Malley failed to gain traction in the polls in a field that was dominated by Hillary Clinton and Bernie Sanders.

He had trouble with fundraising, too. The Washington Post reported earlier Monday that the campaign took out a loan late in 2015 to keep the campaign afloat. O'Malley ended the fourth quarter with less than $200,000 cash on hand.