Republican presidential front-runner Donald Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE late Saturday blasted the announcement that former President Bill Clinton William (Bill) Jefferson ClintonEpstein podcast host says he affiliated with elites from 'both sides of the aisle' Ruth Bader Ginsburg lies in repose at Supreme Court Business groups start gaming out a Biden administration MORE will campaign for his wife, Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE.

The real estate mogul said the former president has a “penchant for sexism” in a tweet.

Hillary Clinton has announced that she is letting her husband out to campaign but HE'S DEMONSTRATED A PENCHANT FOR SEXISM, so inappropriate! — Donald J. Trump (@realDonaldTrump) December 27, 2015

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The Democratic front-runner said in an interview last week that Trump has “a penchant for sexism” after the billionaire said she “got schlonged” in losing to then-Sen. Barack Obama in 2008.

“It’s not the first time he’s demonstrated a penchant for sexism,” Hillary Clinton told The Des Moines Register. “Again, I’m not sure anybody’s surprised that he keeps pushing the envelope."

Trump later warned Clinton to "be careful as you play the war on women or women being degraded card."

Trump’s campaign also claimed that the Democratic front-runner bullied women to hide her husband’s “sexist secrets."

Trump later Saturday repeated his claim that Hillary Clinton does not have the stamina for the Oval Office, tweeting that he would “do far more for women than Hillary” and would “keep our country safe, something which she will not be able to do.”

I will do far more for women than Hillary, and I will keep our country safe, something which she will not be able to do-no strength/stamina! — Donald J. Trump (@realDonaldTrump) December 27, 2015

“I’ve had so many women come up to me and say, ‘You’ve got to keep her out, she’s so terrible,’” Trump said early Sunday on Fox News.

This report was updated at 8:18 a.m.