Democratic presidential front-runner Hillary ClintonHillary Rodham ClintonSecret CIA assesment: Russia was attempting to assist Trump Joy Behar: Why do I have to be nice about Trump? Poll: Republicans think media ‘intentionally misled the public’ about polling 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 TrumpSecret CIA assesment: Russia was attempting to assist Trump Trump closes four companies tied to Saudi Arabia Manchin says he's not talking with Trump about job MORE in which he sought to highlight Bill ClintonBill ClintonDonald Trump will be president — but a President Trump may not be what voters expected Emanuel flips the bird when asked about 2020 Clintons remember John Glenn as a 'uniquely American hero' 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 SandersDemocrats: Where the hell are You? Sanders on Trump pick: This is how a rigged economy works Trump picks Goldman Sachs chief for top economic adviser: report 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.”