GOP presidential front-runner Donald TrumpDonald John TrumpBiden adds to vote margin over Trump after Milwaukee County recount Krebs says allegations of foreign interference in 2020 election 'farcical'  Republicans ready to become deficit hawks again under a President Biden MORE is doubling down on his attacks against former President Bill ClintonWilliam (Bill) Jefferson ClintonBiden's climate plans can cut emissions and also be good politics Trump says he'll leave White House if Biden declared winner of Electoral College Obama: 'Hopeless' to try to sell as many books as Michelle MORE, saying he hurt Hillary ClintonHillary Diane Rodham ClintonValadao unseats Cox in election rematch Trump says he'll leave White House if Biden declared winner of Electoral College Federal workers stuck it out with Trump — now, we're ready to get back to work MORE’s chances against then-Sen. Barack Obama (D-Ill.) seven years ago.

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“He was not very good for her,” Trump told host Savannah Guthrie Tuesday on NBC’s “Today." "He did very, very poorly. He failed in 2008 — he failed really badly. He frankly did a very poor job in campaigning.”

Trump was disputing the notion that Bill Clinton would boost his wife’s second White House bid this election cycle. Reports emerged Monday that the former president is stumping for his wife in the early voting state of New Hampshire next year.

Trump claimed that it is also open season on Bill Clinton’s legacy should he reenter the public eye for his wife.

“If he’s going to be out there campaigning, he’s certainly fair game,” he said. "I think just about everybody agrees with me on that.”

The outspoken billionaire added he is not holding back from discussing the former president’s extramarital indiscretions, real or imagined.

“Is that alleged?” he asked Guthrie when she used the term while discussing Bill Clinton’s affair with then-White House intern Monica Lewinsky. "I don’t think that’s alleged. If he’s admitted to it, you don’t have to use the word 'alleged.'”

Trump had escalated his attacks on the Clintons Monday by accusing Bill Clinton of having a “terrible record of women abuse."

Hillary Clinton, meanwhile, criticized the real estate tycoon of his own “penchant for sexism” last week.

Trump raised eyebrows earlier this month by suggesting that the former first lady "got schlonged" by Obama during the 2008 Democratic presidential primary.