Democratic presidential front-runner Hillary ClintonHillary Rodham ClintonBiden: ‘Guys, I’m not running’ Trump says email hacking during election 'could've been China' or other groups Maxine Waters: ‘I’ve never seen anybody as disgusting or as disrespectful’ as Trump MORE said Sunday that attacks against her husband over past infidelities and allegations of sexual abuse “won’t work,” calling them a “dead end” and a “blind alley” for her rivals.

Speaking Sunday on CBS's "Face the Nation," Clinton was asked to respond to an ad released last week by GOP front-runner Donald TrumpDonald TrumpSeven key players for Trump on immigration Spicer: Media coverage of Trump has not been fair Kasich finds it hard to rule out 2020 MORE in which he sought to highlight Bill ClintonBill ClintonBuzzFeed toasts free press at alternative WHCA party Why Trump sitting out the correspondents' dinner is a huuuge mistake Larry Summers: Mnuchin squandering his credibility with Trump tax proposal MORE’s affair with former White House intern Monica Lewinskey.

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“If he wants to engage in personal attacks from the past, that’s his prerogative. So be it,” Clinton said, vowing that she’d continue to run as a women’s rights candidate on issues such as equal pay and abortion rights.

Trump has argued that Clinton doesn’t have moral standing to run as a women’s rights candidate, alleging that she sought to bully into silence Bill Clinton’s accusers of sexual impropriety.

The attacks have spurred debate about whether the Clintons’ personal life is fair game. Several other Republican presidential candidates, and even Clinton’s rival for the Democratic nomination, Vermont Sen. Bernie SandersBernie SandersObama makes 0K for speech at A&E event: report Van Jones: Obama should do ‘poverty tour’ Sanders calls for renewed focus on fighting climate change MORE, have criticized the former president for his behavior towards women.

It comes as Bill Clinton has played a more visible role in his wife's presidential campaign. On the campaign trail, both have sought to deflect questions over his past by refusing to engage with Trump.

Clinton on Sunday called that avenue of attack a “dead end.”

“It’s been fair game going back to the Republicans for some years,” Clinton said. “They can do it again if they want to, that will be their choice as to how to run in this campaign. It didn’t work before, it won’t work again because people are focused on not the past, but the future.”

“They can do whatever they want, more power to them,” she added. “I think it’s a dead-end, a blind alley for them, but let them go. I’m going to talk about the differences between us because I think that’s what Americans care about.”