Romney was also one of seven GOP senators who voted to convict Trump for inciting the deadly riot at the U.S. Capitol on January 6.
Utah Republicans ultimately voted Saturday not to censure Romney, who was joined by six other GOP senators including Susan Collins of Maine, Lisa Murkowski of Alaska, Richard Burr of North Carolina, Bill Cassidy of Louisiana, Ben Sasse of Nebraska, and Pat Toomey of Pennsylvania, to impeach Trump. The vote failed by 798 votes to 711.
The booing and heckling lasted over a minute, which prompted Utah GOP chair Derek Brown to intervene by walking up on stage and say, "My friends, this is the moment I was talking about, please show respect".
Despite the rough reception at the convention, Romney finished his speech by saying he has been a Republican all his life.
'We need to come together in strength and unity, ' he said.
"I was appalled", Collins said.
"Mitt Romney is an outstanding senator who serves his state and our country well", Ms Collins told CNN.
The GOP senator asserted in early 2021 that Trump had "disrespected the American voters, dishonored the election system, and disgraced the office of the presidency", a reference to the ex-POTUS' persistent claims the 3 November 2020 presidential election was the "most corrupt" in USA history.
'Heartwarming to read new polls on big-shot warmonger Liz Cheney of the great State of Wyoming. And she did what she felt was right, and I salute her for that. 'They never liked her much, but I say she'll never run in a Wyoming election again!'