Speaking at the New York premiere, Moore revealed he had been inspired to make the film just 11 days ago, after his experience of being in Britain during the Brexit vote.
“I was in England during Brexit week, promoting my last film,” the Guardian reports. “All the polls said it wouldn’t happen. They were wrong.”
The film is based around a monologue from Moore about his initial struggles with supporting Hillary Clinton, and how he came to give her his full-throated endorsement. He had only finished editing the film at 7am that day.
It is now on wider release in New York and Los Angeles, with no word of UK screenings.