Megyn Kelly. Jemal Countess/Getty Images Donald Trump's campaign fired back at Megyn Kelly on Tuesday night after the Fox News anchor squared off with former House Speaker Newt Gingrich in a testy interview.

Gingrich, who supports the GOP nominee's bid for the White House, appeared on "The Kelly File" to discuss the state of the election. The interview quickly veered off the rails when the subject of sexual-misconduct allegations against Trump came up.

Trump's social-media adviser, Dan Scavino Jr., tweeted: "Megyn Kelly made a total fool out of herself tonight attacking Donald Trump. Watch what happens to her after this election is over."

During the interview, Gingrich was critical of Kelly's coverage of the many sexual-misconduct allegations against Trump.

"You are fascinated with sex and you don't care about public policy," Gingrich said. The former House speaker appeared nearly breathless when Kelly said "if Trump is a sexual predator, then it is a big story."

"I'm sick and tired of people like you using language that's inflammatory that's not true," Gingrich said.

Gingrich took issue with the manner in which the media had covered the allegations. Several women are now accusing Trump of some form of unwanted sexual contact.

Trump has denied the allegations and vowed to sue every one of his accusers after the election.