Although President-elect Donald Trump has alleged that millions voting illegally in the 2016 election cost him the popular vote, only one case of noncitizen voter fraud has been confirmed.

The New York Times reported on Sunday that out more than 137.7 million ballots cast in November, election officials have said they can only confirm one allegation of voter fraud. A few dozen more cases are still under investigation but haven’t been confirmed, while many other tips about voter fraud failed to prove accurate.

The Times reached out to all 50 states and found no states that responded had reported widespread voter fraud. Only Kansas, where Secretary of State Kris Kobach has pursued voter ID laws on the grounds that they fight voter fraud, did not respond to requests. 

{mosads}Several states reported larger numbers of allegations that were under review, the Times reported. Tennessee had reported 40 credible allegations out of its primary and general election ballots, although none of the cases had yet been confirmed.

Throughout his campaign, Trump alleged that the election was “rigged” and that there would be rampant voter fraud at the polls on Election Day. After Trump won the election — but lost the popular vote — he tweeted that he would’ve won the popular vote if the “millions of people who voted illegally” weren’t counted.

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

— Donald J. Trump (@realDonaldTrump) November 27, 2016