MS NOW

Latest Iowa poll points to a Democratic top tier for 2020 race

The largest field in history is set; the debates are poised to begin; and there's some helpful polling giving us a sense of who's in the top tier — for now.

Voting booths await voters in Red Oak, Iowa, Tuesday, June 3, 2014, ahead of the Iowa primary elections.
Voting booths await voters in Red Oak, Iowa, Tuesday, June 3, 2014, ahead of the Iowa primary elections.AP

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."