A postal worker in Erie, Pennsylvania, who claimed that a postmaster instructed workers to backdate ballots mailed after Election Day, has admitted to U.S. Postal Service investigators that he fabricated his story, three people with knowledge of the matter told The Washington Post on Tuesday. Richard Hopkins signed an affidavit saying he heard the supervisor make the order, which was made public by the right-wing group Project Veritas. President Trump has refused to concede the election, claiming there was widespread voter fraud, and his campaign provided Hopkins' affidavit to Sen. Lindsey Graham (R-S.C.). Graham then sent a letter to the Department of Justice and FBI regarding the allegations, demanding they launch an investigation.The Post reports that Hopkins was first interviewed on Friday, and on Sunday, he told investigators he made the whole thing up and signed an affidavit recanting his story. The House Oversight Committee tweeted on Tuesday evening that Hopkins did not explain why he made up the allegations. In a Facebook post, Rob Weisenbach, the postmaster in Erie, said Hopkins' claims were "100 percent false" and "made by an employee that was recently disciplined multiple times. The Erie Post Office did not backdate any ballots."More stories from theweek.com Trump wants to be forced out Trump's aggressive assault on election integrity is reportedly making some of his outside lawyers queasy 3 Latino politicians considered top contenders to fill Kamala Harris' Senate seat