In the fall of 2016, Michael Moore was one of the few liberal cultural figures who predicted that Donald Trump would win the presidential election. Now the documentary filmmaker says his next project, Fahrenheit 11/9, a Trump-focused movie that takes its title from the president’s fateful election day, will arrive in theaters in time for the midterms.

Moore announced the film Thursday night during a taping of The Late Show With Stephen Colbert, and shared a clip from it—a scene of him being kicked out of Trump’s Mar-a-Lago golf club.

“He outsmarted all of us,” Moore told Colbert of Trump. “Nobody took him seriously. I tried to warn people he was gonna win Michigan, Wisconsin, Pennsylvania. People laughed or booed. I wasn’t saying it ’cause I wanted it to happen.”

Fahrenheit 11/9 will open nationwide in 1,500 theaters on September 21, according to a spokesperson for the film. A previous documentary Moore was working on had been embroiled in the Weinstein Company’s collapse. Fahrenheit 11/9 will be distributed by former Open Road C.E.O. Tom Ortenberg, who handled Moore’s earlier films, Fahrenheit 9/11 and Sicko, while an executive at Lionsgate.

According to a logline, Fahrenheit 11/9 is “a provocative and comedic look at the times in which we live. It will explore the two most important questions of the Trump era: how the f--k did we get here, and how the f--k do we get out? It’s the film to see before it’s too late.”

Backstage at Colbert, Moore met a new political star who was a last-minute booking on the talk show, Alexandria Ocasio-Cortez, who just stunned the Democratic establishment by winning the primary in New York’s 14th Congressional District. Moore’s crew had shot footage of Ocasio-Cortez two months ago, and he intends to include her in his film.

In May, Moore teased the documentary on Twitter, sharing a clip of him and Trump appearing together on Roseanne Barr’s 1998 talk show, The Roseanne Show. In the clip, Trump congratulated Moore on Roger & Me, Moore’s film about General Motors C.E.O. Roger Smith. “I hope he never does one on me,” Trump said.

Last year, Moore and Trump traded Twitter barbs over Moore’s Trump-inspired one-man Broadway show, The Terms of My Surrender. “While not at all presidential I must point out that the Sloppy Michael Moore Show on Broadway was a TOTAL BOMB and was forced to close. Sad!,” the president tweeted. Moore’s show was not, in fact, a bomb— it took in a respectable $4.2 million and was seen by 74,484 people.

Moore’s 2004 documentary Fahrenheit 9/11—about the George W. Bush presidency, and Bush’s war on terror—earned $119 million at the domestic box office, and remains the highest-grossing documentary of all time.

CORRECTION (8:42 P.M.): This piece has been updated to clarify that Fahrenheit 11/9 is not the movie Moore had been making with the Weinstein Company.