Sen. Bernie SandersBernie SandersIn defense of incrementalism: A call for radical realism Thomas Piketty says pandemic is opportunity to address income inequality Trump will soon be out of office — but polarization isn't going anywhere MORE (I-Vt.) on Monday questioned supporters of President-elect Donald TrumpDonald John TrumpBiden adds to vote margin over Trump after Milwaukee County recount Krebs says allegations of foreign interference in 2020 election 'farcical'  Republicans ready to become deficit hawks again under a President Biden 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 ClintonValadao unseats Cox in election rematch Trump says he'll leave White House if Biden declared winner of Electoral College Federal workers stuck it out with Trump — now, we're ready to get back to work MORE after she won the Democratic nomination.