Republican presidential front-runner Donald TrumpDonald TrumpSanders: Trump a 'pathological liar' Trump calls audience member onto stage at rally Melania opens Trump's Florida campaign rally MORE is pinning blame for the Syrian civil war and the rise of the Islamic State in Iraq and Syria on Democratic presidential candidate Hillary ClintonHillary Rodham ClintonConway criticized by president of alma mater Buttigieg endorsed by ex-treasurer in DNC race Jerry Springer: Trump’s media attacks go too far MORE.

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“She is the one that caused all this problem with her stupid policies,” Trump said on “Fox News Sunday.” “You look at what she did with Libya, what she did with Syria.”

“You look, she was truly, if not the, one of the worst secretary of States in the history of the country,” he added. “She talks about me being dangerous; she’s killed hundreds of thousands of people with her stupidity.”

Fox News host Chris Wallace questioned Trump about the claim.

“What do you mean, ‘hundreds of thousands?’” Wallace asked.

“She was secretary of State. Obama was president, the team,” Trump responded. “Two real geniuses.”

Clinton has publicly broken from the Obama administration on Syria since stepping down as secretary of State, advocating for increased U.S. involvement in the conflict, such as by implementing a no-fly zone.