Mr. Romney, who has represented Utah in the Senate since 2019, became the first senator in American history to vote to remove a president from his own party from office when he voted to convict Mr. Trump at his first impeachment trial in 2020. Mr. Trump, he said at the time, was “guilty of an appalling abuse of public trust” for his pressure campaign on Ukraine to investigate his political rivals, including Joseph R. Biden Jr.
A year later, Mr. Romney was one of seven Republicans who voted to convict Mr. Trump in his second impeachment trial.
He hasn’t shied away from criticizing the former president. When Mr. Trump tried to overturn the results of the 2020 election, Mr. Romney accused him of trying to “subvert the will of the people.”
“It is difficult to imagine a worse, more undemocratic action by a sitting American president,” Mr. Romney wrote on Twitter.
He was one of several prominent Republicans who said they did not vote for Mr. Trump in the November election.
In January, Mr. Romney was heckled at the Salt Lake City airport and on a plane as he was traveling to Washington for a joint session of Congress to certify the election victory of President Biden. In one video, passengers on the plane can be heard chanting “traitor, traitor, traitor,” and at least one person in the video called for him to resign.
On the night of Jan. 6, hours after a group of Mr. Trump’s supporters stormed the Capitol to disrupt the vote certification, Mr. Romney addressed the Senate: “We gather due to a selfish man’s injured pride and the outrage of supporters who he had deliberately misinformed for the past two months and stirred to action this very morning. What happened here today was an insurrection incited by the president of the United States.”