Sen. Susan Collins (R-Maine) on Sunday defended fellow Republicans Sen. Mitt Romney (R-Utah) and Rep. Liz Cheney (R-Wyoming) against intraparty attacks driven by the duo’s push to impeach former President Donald Trump, who continues to command unwavering loyalty among much of the GOP. Collins, who, like Romney, voted “yes” on a Senate motion in February to convict Trump on the charge of “incitement to insurrection,” complained to CNN’s Jake Tapper on “State of the Union” that her fellow Republicans booed Romney at the Utah GOP state organizing convention. “I was appalled,” Collins said. “Mitt Romney is an outstanding senator who served his state and our country well,” she added. When Romney took to the stage at the Maverick Center in West Valley City, Utah, on Saturday, he was met with a cacophony of catcalls, including shouts of “traitor” and “communist.” “You can boo all you like,” Romney said on stage. “I’ve been …