Washington (CNN) Donald Trump has no qualms about attacking Hillary Clinton over past allegations of Bill Clinton's behavior.

"Well, I don't want to say it's a threat. But it is a threat," he told NBC's Chuck Todd on "Meet the Press" in an interview aired Sunday.

He added "it's fine" if his own personal history -- including his divorces -- is scrutinized during the presidential race.

The Republican front-runner has blasted the former president, calling him "an abuser" and highlighting allegations from Juanita Broaddrick saying Clinton had raped her , as Trump pushes back on the campaign trail against Democratic rival Hillary Clinton casting him as sexist.

Trump repeated his criticism, saying Hillary Clinton is "married to an abuser. A woman claimed rape, and all sorts of things. I mean, horrible things."

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