Former Montana Gov. Brian Schweitzer has endorsed Martin O'Malley's underdog presidential campaign, giving the former Maryland governor the most high-profile endorsement of his run so far.

ADVERTISEMENT

"I’m endorsing Martin for President today because I believe he is the candidate that best represents the future of our Party,” Schweitzer said in a statement released by the campaign.

"Martin and I don’t agree on every issue, but he is the only candidate with a proven record of getting things done, and I believe he is the best candidate to take on Republicans in November 2016.”