Republican presidential front-runner Donald TrumpDonald TrumpPelosi gives Trump an incomplete for first 100 days Poll: More say Trump will increase their taxes Warren to Trump: The Constitution applies to you, too MORE late Saturday blasted the announcement that former President Bill ClintonBill ClintonPatagonia threatens to sue Trump over national monuments order Robert Siegel leaving NPR's 'All Things Considered' Press: Hillary's doomed bid MORE will campaign for his wife, Hillary ClintonHillary Rodham ClintonWant a tremendous deal on infrastructure spending? Suspend Davis-Bacon Constitutional amendment could vastly improve campaign finance The Hill's Whip List: Who to watch on GOP's new ObamaCare bill MORE.

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

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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’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.