Michael Moore filmed his one-man show in secret, and released it on television in the month leading up to the 2016 Presidential Election, in a (failed) attempt to keep Donald Trump from becoming President of the United States.
Michael Moore correctly predicted that Michigan, Pennsylvania and Wisconsin would be won by Donald Trump in the general election, despite having been won by Democrats for six consecutive presidential elections, and most polling indicated they would be again. The flipping of those three states from Democratic to Republican was considered a major upset.