Sen. Bernie SandersBernie SandersVolatile presidential polls spark new round of anxieties GOP memo deflects some gun questions to 'violence from the left' British Bookmaker: Warren has replaced Biden as Democratic primary favorite MORE (I-Vt.) on Monday questioned supporters of President-elect Donald TrumpDonald John TrumpTrump watching 'very closely' as Portland braces for dueling protests WaPo calls Trump admin 'another threat' to endangered species Are Democrats turning Trump-like? MORE, asking why they would vote for “somebody who is lying.”

Sanders and MSNBC’s Chris Hayes spoke with Trump voters in a town hall in Kenosha, Wis., about the 2016 election.

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Asked about Trump’s proposed ban on Muslims entering the U.S., several supporters said Trump just suggests controversial policies for attention and isn’t serious.

Sanders minced no words with his reply.

“Why do you vote for somebody who, in a sense then, is lying?”

Several Trump supporters speaking with Sanders said they would not support a Muslim ban, despite Trump touting it early in his campaign.

“I would never want to see anyone thrown out just because of their beliefs. I mean, that’s awful, no,” one supporter said.

“A lot of what he says is unimplementable rhetoric just to gain attention,” another said.

Sanders said Trump won the election because "there's a lot of pain in this country," especially in the middle class, that he was able to tap into.

"One of the arguments as to why Trump won is the belief that most or many of his supporters are sexists or racists or homophobes," Sanders said. "I happen not to believe that's the case. I think what he did do is he said, 'You know what, there's a lot of pain in this country, people are scared and people are worried.' People are tired of status quo politics. He broke through that."

Throughout Sanders' Democratic primary bid, he denounced income inequality and advocated for economic reform. Sanders backed Hillary ClintonHillary Diane Rodham ClintonAre Democrats turning Trump-like? The Hill's Campaign Report: Battle for Senate begins to take shape The Hill's Morning Report — Trump and the new Israel-'squad' controversy MORE after she won the Democratic nomination.