Washington (CNN) Republican Sen. Mitt Romney harshly criticized President Donald Trump on Wednesday over his actions toward Ukraine, saying the President is "guilty of an appalling abuse of public trust" in an emotional speech on the Senate floor.

In a stunning break with his own party, the Utah Republican voted to convict the President on the abuse of power charge brought by the House in the impeachment trial , making him the only Republican senator to vote to convict on one of the two articles of impeachment. He voted to acquit on the second article, obstruction of Congress.

"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," Romney said. "Yes, he did."

"The President asked a foreign government to investigate his political rival. The President withheld vital military funds from that government to press it to do so. 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," Romney said.

Read More