Supporters of Sanders began flocking in immediately after caucus locations closed, all with the same complaint: that precinct leaders and other campaigns were conspiring against their candidate.

One woman who spoke with the Washington Examiner on the condition of anonymity said the precinct captain at her location in Des Moines was biased against Sanders and allowed supporters of former South Bend, Indiana, Mayor Pete Buttigieg to vandalize their signs.

“We put up our signs to show undecided caucusers and others during the realignment where to stand for Sanders, but then, supporters of Buttigieg rushed us and put stickers over the sign,” the woman said. “When it was our turn to give a speech, the Buttigieg supporters kept interrupting us, and the campaign didn’t do anything.”