Donald Trump on Sunday used the platform of the presidency to peddle a fringe conspiracy theory to justify his loss of the popular vote, claiming without evidence that millions of people voted illegally Nov. 8. Trump’s tweets marked an unprecedented rebuke of the U.S. electoral system by a president-elect and were met with immediate condemnation from voting experts and others. And they offered a troubling indication that Trump’s ascension to the highest political office in the United States may not alter his penchant for repeating unproven conspiracies perpetuated by the far-right. “In addition to winning the Electoral College in a landslide, I won the popular vote if you deduct the millions of people who voted illegally,” Trump wrote on Twitter. There is no evidence to support Trump’s claim and PolitiFact ruled it false. Several hours later, he added more specifics, but again without any evidence: “Serious voter fraud in Virginia, New Hampshire and California – so why isn’t the media reporting on this? Serious bias – big problem!” Election law experts quickly rejected Trump’s claims as farfetched. “There’s no reason to believe this is true,” said Rick Hasen, a professor specializing in election law at the University of California, Irvine. “The level of fraud in US elections is quite low.” Hasen added, “The problem of non-citizen voting is quite small — like we’re talking claims in the dozens, we’re not talking voting in the millions, or the thousands, or even the hundreds.”