President Donald Trump said on Wednesday he would seek an investigation into what he believes was voter fraud in the November election, despite overwhelming consensus among state officials, election experts and politicians that it is rare in the United States.

The announcement drew rebukes from both Republicans and Democrats who said the Republican president's unsubstantiated claims of large-scale fraud could undermine voting rights efforts as well as confidence in the new U.S. chief executive.

In the Nov. 8 election, Trump lost the popular vote to Democrat Hillary Clinton by nearly 3 million ballots. Irked by that large figure, he has blamed voter fraud without citing evidence.