the last book I ever read (Tim Alberta's American Carnage: On the Front Lines of the Republican Civil War and the Rise of President Trump, excerpt thirteen)

from American Carnage: On the Front Lines of the Republican Civil War and the Rise of President Trump by Tim Alberta:

Finally, on the fourth day of his presidency, Trump used his first meeting with congressional leaders to complain that he would have won the popular vote had it not been for some three to five million ballots being cast illegally. The baseless claim drew a fresh round of harsh media coverage; election officials around the country, both Republican and Democratic, said there had been no indications of meaningful voter fraud, much less on a massive scale.

By any metric, this was a baneful start for the new administration.