GOP presidential candidate Carly Fiorina said Monday that Donald TrumpDonald John TrumpWhere do we go from here? Conservation can show the way Gov. Ron DeSantis more popular in Florida than Trump Sotomayor accuses Supreme Court of bias in favor of Trump administration MORE is justified in publicly targeting former President Bill ClintonWilliam (Bill) Jefferson ClintonEx-CIA chief calls Trump intel shakeup a 'virtual decapitation' of the intelligence community Meghan McCain after Gaetz says Trump should pardon Roger Stone: 'Oh come on' Enlightening the pardon power MORE in connection with his wife's campaign for the White House.

“Of course Bill Clinton is fair game,” she said on Fox News’s “Fox and Friends." "He’s a former president."

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“As I recall, Donald Trump threw [former President] George W. Bush under the bus way back in September,” Fiorina added of the GOP’s current presidential front-runner.

Fiorina said, however, that the former first lady and secretary of State is her own candidate.

“But you’re not going to beat Hillary ClintonHillary Diane Rodham ClintonRussian interference reports rock Capitol Hill Judge dismisses Nunes' lawsuit against Fusion GPS The Hill's Campaign Report: What to watch for in Nevada MORE by attacking Bill Clinton,” she said. "You’re going to beat Hillary Clinton — I’m going to beat Hillary Clinton — by attacking her track record and her trustworthiness.”

Fiorina added that she is unsurprised Clinton is discussing her gender on the 2016 campaign trail.

“Of course she’s going to play the woman card, that’s what she does,” she said.

“There are people out there — lots of people, men and women — who think it’s time for a woman president,” Fiorina continued. "My message to them will be, ‘How about an honest woman?'"

Trump is escalating his personal attacks against the Clintons following reports Bill Clinton is joining his wife on the campaign trail next year. He accused the former president of having a “terrible record of women’s abuse” Monday morning.

Hillary Clinton, meanwhile, charged last week that Trump has his own “penchant for sexism” toward women. She has harshly rebuked Trump for saying she “got schlonged” during her loss in the 2008 Democratic presidential primary to then-Sen. Barack Obama (D-Ill.).

Trump has denied the term — Yiddish for “penis” — is vulgar, arguing that it describes overwhelming defeat instead.