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Former White House Press Secretary Ari Fleischer told Neil Cavuto Monday that Republican presidential nominee Donald Trump is "not a Republican."

"He is an independent who leased the name 'Republican' to put on the 'building' that he created to run for the presidency," Fleischer, who served under President George Bush, said.

"It's been the Hatfields and McCoys almost since Day 1," he said of the Clinton-Trump contest, referring to the iconic warring West Virginia families.

But, Fleischer cautioned that despite Trump's perceived shortcomings, Hillary Clinton would make a worse president than him.

"The worst situation you can have is Hillary Clinton as president," he said, questioning her foreign policy experience.

"I find Donald Trump to be personally offensive [and] I find Hillary Clinton to be professionally offensive," Fleischer said.

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