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Clinton and Sanders aren’t the only Dems that matter in Iowa

The race for the Democratic nomination looks like a two-person contest, but tonight, Martin O'Malley supporters are likely to matter quite a bit.

Democratic U.S. presidential candidates Martin O'Malley, Hillary Clinton and Senator Bernie Sanders pose together before the start of the NBC News - YouTube Democratic presidential candidates debate, Jan. 17, 2016. (Photo by Randall Hill/Reuters)
Democratic U.S. presidential candidates Martin O'Malley, Hillary Clinton and Senator Bernie Sanders pose together before the start of the NBC News – YouTube Democratic presidential candidates debate, Jan. 17, 2016. REUTERS

Steve Benen is a producer for "The Rachel Maddow Show," the editor of MaddowBlog and an MS NOW political contributor. He's also the bestselling author of "Ministry of Truth: Democracy, Reality, and the Republicans' War on the Recent Past."