Former Texas Gov. Rick Perry (R) says Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE would be torn apart in a debate with Donald Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE.

"Donald Trump will peel her skin off in a debate setting and actually, he'll peel it off this evening out in San Jose as well," Perry said on Fox News when asked about a potential debate between the two presidential contenders.

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Perry, who backed Trump in May, said Clinton is not used to taking criticism and called out the Democratic front-runner for not holding a press conference in months. He said she does not "want to take hard questions from the media" or in a debate setting.

He made the remark shortly after Clinton delivered a scathing attack on Trump, warning in a speech that the presumptive GOP nominee is unfit to be commander in chief.

“Donald Trump’s ideas aren’t just different; they are dangerously incoherent,” the former secretary of State said in a speech in San Diego. “They aren’t even really ideas, just a series of bizarre rants, personal feuds and outright lies.

“He is not just unprepared — he is temperamentally unfit to hold an office that requires knowledge, stability and immense responsibility,” Clinton added.

Perry downplayed Clinton's attacks and said Trump grasps the issues voters care about.

"Donald Trump understands what the American people are really tuned into today, and all of these attacks that we saw or we heard her talk about today — I think it's just off the skin of the duck, off the back of the duck," Perry said on Fox News.

"This is just water that's flowing out of her that's not having any impact."