Iowa Democrats Ready Caucuses That Will Shape Presidential Race

  • Sanders, Biden, Warren and Buttigieg bunched tightly at top
  • State Democrats work to prevent delays in reporting results
Photographer: Al Drago/Bloomberg
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Iowa Democrats prepared to pack firehouses, schools and community centers across the state Monday night to give the first read in the race to challenge President Donald Trump in November.

Unlike a primary, caucus participants gather in their local precincts to publicly declare their support for a candidate. Candidates must have at least 15% support in the first round. The rules allow supporters of candidates who don’t reach that threshold to shift allegiance to another candidate, declare themselves uncommitted or just go home.