After Trump was defeated in the 2020 presidential election, he and his allies made many allegations of election fraud that were dismissed by numerous state and federal judges, election officials, governors, and government agencies as completely baseless. Multiple congressional Republicans, as well as governors and other elected officials, refused to acknowledge Biden's victory. The Trump campaign and its allies filed at least 63 lawsuits, including to the Supreme Court, all of which were rejected. Trump pressured Republican officials in key states to block the certification of votes. Trump also pressured the Justice Department to challenge the election results. The Justice Department and Department of Homeland Security found no evidence of significant election fraud. Trump's failed efforts presaged the January 6 attack on the U.S. Capitol.