Sanders: Trump is a ‘pathological liar’
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Bernie SandersBernard (Bernie) Sanders2020 Dem Seth Moulton calls for expanding cannabis access for veterans Hillicon Valley: Florida county that backed Trump was one of two hacked by Russians | Sandberg pushes back on calls to break up Facebook | Conservative groups ask WH to end Amazon talks over Pentagon contract Sanders set to become first 2020 candidate to call for ban on for-profit charter schools MORE on Monday called Donald TrumpDonald John TrumpComey: Barr is 'sliming his own department' GOP Mueller critic says Flynn contacted him during special counsel probe: report Acting DHS secretary threatened to quit after clashing with Miller: report MORE a “pathological liar” amid the GOP presidential front-runner blaming the Vermont senator’s supporters for causing disruptions at his rallies.

“There was zero effort on the part of our campaign to organize — any disruption — at Trump's” rallies, Sanders said at a MSNBC town hall. “And, you know, if you know me — I've never run a negative TV ad in my life.

“I know Marco RubioMarco Antonio RubioHillicon Valley: Trump takes flak for not joining anti-extremism pact | Phone carriers largely end sharing of location data | Huawei pushes back on ban | Florida lawmakers demand to learn counties hacked by Russians | Feds bust 0M cybercrime group Huawei says inclusion on US trade blacklist is in 'no one's interest' Frustrated GOP senators want answers from Trump on Iran MORE and I know Ted CruzRafael (Ted) Edward Cruz Eye-popping number of Dems: I can beat Trump 'SleepyCreepy Joe' and 'Crazy Bernie': Trump seeks to define 2020 Dems with insults The Hill's Morning Report - Presented by Pass USMCA Coalition - Restrictive state abortion laws ignite fiery 2020 debate MORE and all these guys,” Sanders said. “But with Trump — what you are dealing with — and I say this without any joy. This guy's a pathological liar,” Sanders said.

When moderator Chuck Todd pushed Sanders further on his criticism, the Vermont senator referenced an article that said Trump "never has any facts."

Sanders blasted Trump for calling him a communist, saying it's a "total, absolute, complete lie."

“So it is very difficult dealing with some guy who lies all the time. And what I think Senator Rubio and many of us feel is this is a guy who's inciting violence,” Sanders said.

Sanders also accused Trump for encouraging violence from his supporters.

“What I am disturbed about is we have a major candidate for president of the United States, Donald Trump, who is literally inciting violence among his supporters,” Sanders said.

Trump's rally in Chicago last Friday was canceled due to safety concerns over massive protests. A protestor at an Ohio rally on Saturday was arrested and charged with disorderly conduct after charged the stage.

The real estate mogul has said he doesn’t condone the violence at his rallies.