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Mike Huckabee said on tonight's "Kelly File" that he can't explain why Trump declined to disavow an endorsement from former KKK leader David Duke during a Sunday TV interview.

But the former Arkansas governor and Trump supporter said that there's no question that the GOP frontrunner disavows Duke and the KKK, and is not a racist.

Trump's critics pounced on the State of the Union interview, including 2012 GOP nominee and Marco Rubio-supporter Mitt Romney, who called Trump's response to Jake Tapper's questioning "disqualifying and disgusting."

Huckabee told Megyn Kelly that he was "amazed" by Romney's words and said that Trump has "repeatedly disavowed David Duke, disavowed the Klan."

"I don't think anybody seriously is suggesting that he is giving a wink and a nod at the KKK," he said. "They're a deplorable, disgusting, abominable entity. I just don't know of anybody who embraces them anymore except for a handful crazy people."

Kelly responded: "But the very point you're making, that it's such a no-brainer, is what makes his response to Jake Tapper so confusing to many."

Huckabee agreed, saying that's why he wondered if Trump possibly misheard or misunderstood Tapper's question, as Trump said on Today this morning.

"Governor, you know what he heard," Kelly said. "He repeated back 'David Duke' and 'white supremacists' to Jake Tapper so you at least know he heard that."

Hucakbee replied: "Right, and one of the things that has happened, he has disavowed Friday, he disavowed today. I don't know why he didn't say it as clearly on Sunday to Jake Tapper. I simply don't know."

Watch the full interview above.

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