Michael Moore goes off on Trump ahead of State of the Union
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Liberal filmmaker Michael Moore went after President TrumpDonald John TrumpProgressive group launches M pro-Biden ad buy targeting young voters Ilhan Omar: GOP response to calls for police reform 'was vicious' White House considers sweeping travel ban on members, families of the Chinese Communist Party: report MORE ahead of the president's inaugural State of the Union address next week, calling him a "narcissist" and "sociopath."

“Donald J. Trump has proven himself to be completely unfit for office, a threat to our country, and an imminent danger to the world," Moore wrote in a letter to supporters of MoveOn.org, one of the progressive groups hosting an alternative anti-Trump event next week.

"He is not well; he is a malignant narcissist and an active sociopath. And because he holds the codes to fire nuclear weapons, he is a singular threat to humanity," Moore added.

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Moore, who has made such comments before while criticizing Trump, is slated to participate in the "People's State of the Union," an event featuring several Hollywood celebrities known for their anti-Trump views, including Mark Ruffalo, Whoopi Goldberg and Rosie Perez. 

The event, which Ruffalo described as a populist alternative to the president's address, will be a ticketed gathering in New York City on Monday, the night before Trump's address before Congress.

Moore wrote Saturday that "our problems go far beyond one sociopath president."

"The mission that we are on and the work that we must do is to tear down the rigged system that produced Trump in the first place," he wrote. "We must imagine the America that we want to live in. We must create the post-Trump America.