There has been no evidence of widespread election fraud in the Nov. 8 presidential contest, the White House said on Monday in reaction to U.S. President-elect Donald Trump’s tweet over the weekend alleging millions of illegal votes and fraud in three states.

White House spokesman Josh Earnest, speaking to reporters at a daily briefing, deferred comments on Trump’s specific tweets to the president-elect’s team, but added: “What I can say, as an objective fact, is that there has been no evidence produced to substantiate a claim like that.”

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

On Sunday, Trump said “millions” voted illegally in the national election, scoffing at Hillary Clinton’s nearly 2 million edge in the popular vote and returning to his campaign mantra of a rigged race even as he prepares to enter the White House in less than two months.

READ MORE: Donald Trump says recount push a ‘scam’, calls on Americans to accept results

The president-elect went on to cast a shadow over the legitimacy of an election that he actually won, tweeting that “I won the popular vote if you deduct the millions of people who voted illegally.” He provided further contended that if the popular vote determined the presidency, “It would have been much easier for me to win” it because he would have altered his campaign to pile up overall vote totals, not Electoral College votes.

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It would have been much easier for me to win the so-called popular vote than the Electoral College in that I would only campaign in 3 or 4– — Donald J. Trump (@realDonaldTrump) November 27, 2016

states instead of the 15 states that I visited. I would have won even more easily and convincingly (but smaller states are forgotten)! — Donald J. Trump (@realDonaldTrump) November 27, 2016

– With files from The Associated Press