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Donald Trump says that he does not want the endorsement of former Ku Klux Klan leader David Duke and that he would "certainly" repudiate his support.

"I don't need his endorsement, I certainly wouldn't want his endorsement, I don't need anybody's endorsement," Trump said in an interview on Bloomberg News.

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Asked if he would repudiate an endorsement from Duke, he replied: "Sure."

"I would do that if it would make you feel better," he said, adding "I don't know anything about him."

Duke used his radio program last week to praise Trump's stringent immigration policy and call the real estate mogul "the best of the lot" of the 2016 candidates.

Trump demurred when asked to weigh in on reports that he is popular with white supremacist groups.

"A lot of people like me," he said.

Pressed about whether or not enthusiasm for his campaign from organized white supremacist groups means that something about his message is resonating for unsavory reasons, he replied: "I hope there's not."