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Harvard Law professor emeritus and longtime Democrat Alan Dershowitz agrees with President Trump that Special Counsel Robert Mueller never should have been appointed.

Over the weekend, Trump took to Twitter to call Mueller's Russia probe a "witch hunt" and to insist that there was no collusion between his presidential campaign and Moscow.

"The president's 100-percent right. There never should have been the appointment of a special counsel here. There was no probable cause at that point to believe that crimes had been committed. I've seen no evidence to suggest that crimes have been committed by the president," Dershowitz said on "America's Newsroom" Tuesday.

Instead of a special counsel, he said, Congress should have appointed a nonpartisan special investigative commission, like after the 9/11 attacks, with subpoena power to look into Russia's attempts to meddle in U.S. elections.

"Starting out with finger pointing and trying to criminalize political differences behind the close doors of a grand jury, that's gotten us nowhere," Dershowitz said. "The president's absolutely right. This investigation never should have begun."

Dershowitz said he can't think of "any conceivable reason" why the president would try to remove Mueller, arguing Democrats are "fueling speculation" about the drastic action. 

"That would create a real problem on the Republican side of the aisle, as well as on the Democratic side of the aisle," he said. "I don't think he's going to fire him. I don't think he should fire him."

Watch more above.

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