President-elect Donald Trump alleged Sunday that millions of people voted illegally in the general election nearly three weeks ago.

Trump made his claims on Twitter Sunday afternoon, but did not offer any evidence to support his claims. His tweets likely came in response to continued news over the Wisconsin recount initiated by Jill Stein of the Green Party, who has pledged to initiate recounts in Michigan and Pennsylvania as well.

Writing on Twitter, Trump said that without the "millions of people who voted illegally," he would have won the popular vote on Election Day in addition to the Electoral College.

Trump explained that to do so, he would have focused his campaign efforts in a mere handful of states — three or four, Trump said — instead of the 15 swing states that his campaign routinely visited in the run-up to the election.

Trump's second and third tweets, though not on purpose, emphasize the reason the Founders established the Electoral College, namely because they understood that smaller states wouldn't have a voice in the electoral process if the U.S. chose its president based solely off a popular vote.

Still, there has been no evidence that millions of people voted illegally, nor has there been any evidence that voter fraud occurred on a scale large enough to tamper with the results of the election.

The White House has officially said they support the results of the election and that they believe the will of the American people was "accurately reflected" on Election Day. Even experts consulted by the failed presidential campaign of Hillary Clinton said they have confidence in the results of the election and that they believed no abnormalities occurred.