David Duke encourages listeners to vote for Trump
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David Duke is encouraging his listeners to vote for Republican presidential front-runner Donald TrumpDonald John TrumpTrump rallies in Nevada amid Supreme Court flurry: 'We're gonna get Brett' Trump: 'Good news' that Obama is campaigning again Trump boosts Heller, hammers 'Wacky Jacky' opponent in Nevada MORE.

Duke, a white nationalist and former Ku Klux Klan grand wizard, called Trump's victories in Nevada and South Carolina a "historic day," on the "David Duke Radio Program" Wednesday, according to Buzzfeed News.

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He said voting for Trump's rivals, including Marco RubioMarco Antonio RubioNikki Haley: New York Times ‘knew the facts’ about curtains and still released story March For Our Lives founder leaves group, says he regrets trying to 'embarrass' Rubio Rubio unloads on Turkish chef for 'feasting' Venezuela's Maduro: 'I got pissed' MORE and Ted CruzRafael (Ted) Edward CruzPoll: Cruz leads O'Rourke by 3 in Texas Senate race Julián and Joaquin Castro to campaign with O'Rourke in Texas The Hill's 12:30 Report — Trump rips 'ridiculous' spending bill | FBI dragged into new fight | Latest on Maryland shooting MORE, is "really treason to your heritage," calling the Republican establishment "your enemy."

“I’m not saying I endorse everything about Trump, in fact I haven’t formally endorsed him. But I do support his candidacy, and I support voting for him as a strategic action. I hope he does everything we hope he will do,” Duke said.

He called Trump's candidacy an "insurgency that is waking up millions of Americans," and touted the front-running billionaire's policies, including his immigration plans, and told his listeners it's their job to "get active" and volunteer for Trump. 

"Get off your duff. Get off your rear end that’s getting fatter and fatter for many of you every day on your chairs. When this show’s over, go out, call the Republican Party, but call Donald Trump’s headquarters, volunteer," he said.

"They’re screaming for volunteers. Go in there, you’re gonna meet people who are going to have the same kind of mindset that you have."