Sen. Mitt Romney said Wednesday he will vote to convict President Trump of abuse of power in his dealings with Ukraine, breaking with his Republican colleagues to join Democrats in voting against the commander-in-chief.

“The grave question the Constitution tasks senators to answer is whether the president committed an act so extreme and egregious that it rises to the level of a high crime and misdemeanor. Yes, he did,” Romney of Utah said in a speech on the Senate floor.

“The president asked a foreign government to investigate his political rival. The president withheld vital military funds from that government. The president delayed funds for an American ally at war with Russian invaders,” he continued. “The president’s purpose was personal and political. Accordingly, the president is guilty of an appalling abuse of public trust.”

He will vote against the obstruction of Congress charge.

Romney, the 2012 Republican presidential nominee, said he turned to his Mormon faith for guidance to make the difficult decision.

“I swore an oath before God to exercise impartial justice. I am profoundly religious. My faith is at the heart of who I am. I take an oath before God as enormously consequential,” he said.

Sen. John Kennedy (R-La.) said Romney’s decision was his to make.

“He is entitled to his opinion and he is entitled to his vote and that’s between him and the people of Utah,” he said.

Sen. Josh Hawley said Romney shouldn’t be booted from the Republican caucus as some, including Donald Trump Jr., suggested.

“Oh my gosh, no. The voters will have a chance to weigh in the future if he runs again,” the Missouri Republican said.

Sen. Lamar Alexander (R-Tenn.), who voted last week against having witnesses testify, said, “Every senator has the right to vote however he or she feels.”

But Trump’s Republican allies in the House gave Romney no quarter.

Rep. Jim Jordan of Ohio said the senator was “totally wrong.”

Rep. Doug Collins of Georgia said if that is what he believes, “then he will have to own it.”

Sen. Richard Blumenthal noted that Romney broke away from other Republicans, who vote in lockstep with Trump.

“There’s no victory for the president. … There is a politically driven fear club, not even a fan club, because my Republican colleagues have no great admiration of the president, they just fear him, and that’s the reason for the verdict,” said Blumenthal, a Democrat from Connecticut.