Lieu: There will be 'widespread civil unrest' if Trump fires Mueller

Rep. Ted Lieu (D-Calif.) issued a stark warning to President TrumpDonald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE on Monday evening, saying there would be "widespread civic unrest" if he moved to fire special counsel Robert MuellerRobert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE

"If the president does go ahead and fire Robert Mueller, we would have people take to the streets. I believe there would be widespread civil unrest because Americans believe the rule of law is paramount," Lieu told MSNBC's Chris Hayes.  

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"I think you're going to have protests, and marches, and rallies, and sit-ins. I believe Americans would not stand for the firing of Robert Mueller," he said. 

"The president hasn't been able to point to a single thing that Robert Mueller has done wrong. There is no basis to fire him. And he would have to fire Deputy Attorney General Rod RosensteinRod RosensteinDOJ kept investigators from completing probe of Trump ties to Russia: report Five takeaways from final Senate Intel Russia report FBI officials hid copies of Russia probe documents fearing Trump interference: book MORE first in order to fire Robert Mueller."

The president has ramped up his attacks on Mueller's probe into Russia's election interference, mentioning him for the first time by name in a tweet over the weekend.  

Trump has denied any collusion between his campaign and the Kremlin, and has referred to the probes investigating the matter as a politically motivated "witch hunt."

The Washington Post reported on Monday that Trump's lawyers were aiming to limit the scope of a potential interview with Mueller amid fears the president would be left in a vulnerable position.