GOP presidential candidate Carly Fiorina said Monday that Donald TrumpDonald John TrumpFamily immigration detention centers could be at capacity within days: report Trump likely to meet with Putin in July: report DOJ requests military lawyers to help prosecute immigration crimes: report MORE is justified in publicly targeting former President Bill ClintonWilliam (Bill) Jefferson ClintonThe case for a ‘Presidents’ Club’ to advise Trump After FBI cleared by IG report, GOP must reform itself Bill Clinton hits Trump administration policy separating immigrant families in Father's Day tweet 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."

“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 ClintonTrump mocks 'elites' at campaign rally Trump backs down in rare reversal Election Countdown: Family separation policy may haunt GOP in November | Why Republican candidates are bracing for surprises | House Dems rake in record May haul | 'Dumpster fire' ad goes viral 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.