Carson’s team claimed that Cruz’s campaign deliberately sent emails to supporters to spread false rumors at caucus sites that Carson had dropped out, so his supporters would caucus for other candidates.

“That is really quite a dirty trick,” Carson said speaking to reporters at the end of the evening. “That’s the very kind of thing that irritated me enough to get into this quagmire.”

“To have campaigns come out and send emails to their caucus speakers suggesting that Dr. Carson was doing anything but moving forward after tonight is the lowest of low in American politics,” said Carson campaign manager Ed Brookover.

“This is horseshit,” Rob Taylor, Iowa state representative and Carson’s Iowa co-chair, said simply.

Members of Carson’s team furnished evidence of various precinct captains alleging misconduct by the Cruz campaign.

Ryan Rhodes, Carson’s Iowa state director, showed reporters a text on his phone from Barbara Heki, a Mike Huckabee supporter. “The Cruz speakers at our caucus announced Carson was suspending his campaign for a while after caucus. They did this before the vote. Same thing happened at another caucus. Sounds like slimy Cruzing to me,” the text read.

Jason Osborne, Carson’s deputy senior strategist, read aloud another missive, this one an email from their precinct chair in Muscatine: “The guy speaking for Ted Cruz right before the vote, he was supposed to be done, he announced that there was a story on CNN that Ben Carson was taking a break after Iowa, and then stated, ‘So you might want to rethink wasting your vote on him.’”

Cruz’s team flatly denies the allegations. “That’s absurd,” spokesperson Catherine Frazier said simply.

With additional reporting by Alex Altman

This article was originally published on Time.com.