​President Trump on Monday went after the latest longshot to challenge him in the 2020 Republican primary, mocking former South Carolina Gov. Mark Sanford for his extramarital affair with a “Flaming Dancer.”

​”When the former Governor of the Great State of South Carolina, @MarkSanford, was reported missing, only to then say he was away hiking on the Appalachian Trail, then was found in Argentina with his Flaming Dancer friend, it sounded like his political career was over​,” Trump posted on Twitter.

“It was​, but then he ran for Congress and won, only to lose his re-elect after I Tweeted my endorsement, on Election Day, for his opponent. But now take heart, he is back, and running for President of the United States​,” the president continued.

He concluded by referring to his challengers as “​​​The Three Stooges​” who are “badly failed candidates.”

​Sanford announced he would run against Trump during an appearance on “Fox News Sunday,” joining former Massachusetts Gov. William Weld and former Illinois Rep. Joe Walsh in seeking the Republican nomination.

Sanford made headlines in the summer of 2009 when he went missing for nearly a week and later told reporters he had been hiking the Appalachian Trail.

He eventually admitted he had been in Buenos Aires, Argentina, where he was having an affair with Maria Belén Chapur.

The president apparently misspelled “flamingo dancer” in reference to the traditional Spanish dance Flamenco.

Trump has dredged up Sanford’s relationship with Chapur, a journalist in Argentina, before including in August 2018 when he recalled how he had backed Katie Arrington who defeated Sanford in the Republican primary.

“We endorsed her,” Trump bragged. “And she beat a man that likes flamingo dancers from Argentina.”

“He was supposed to be vacationing on the Tallahassee trail, but he was actually in Argentina,” Trump said.

Sanford said on Fox that he apologized for the affair and drew a contrast between himself and Trump, who has been accused of having relationships with several women, including former porn star Stormy Daniels.

“I learned a level of humility, a level of empathy that I didn’t have before,” he said. “It is something of great regret. It’s something I’ve apologized extensively for.”

“In contrast to the president, where he says there’s not a single thing that he sort of regrets or apologizes for, I profoundly apologize for that,” ​Sanford continued.