Democratic candidate Martin O'Malley is suddenly ending his campaign

Democratic presidential hopeful and former Maryland Gov. Martin O'Malley (D) is suspending his campaign after disappointing returns in Iowa during the state's Monday-night caucuses.

A source close to the campaign told Business Insider that the former Maryland governor will announce that he's dropping out of the race at his caucus party Monday night in Des Moines. He's expected to speak at 9:30 p.m. local time.

The source said that O'Malley spent more time in Iowa than any other candidate and was the most accessible.

Click through some O'Malley fun facts:

Former Secretary of State Hillary Clinton and Sen. Bernie Sanders (I-Vermont) were locked in a tight race.

As of about 10 p.m. ET, O'Malley had less than 1% of the vote.Democratic candidate Martin O'Malley is suddenly ending his campaignDemocratic candidate Martin O'Malley is suddenly ending his campaign

Democratic candidate Martin O'Malley is suddenly ending his campaign

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