At a private fundraiser for Rep. Liz Cheney (R-WY) on Monday night, Sen. Mitt Romney (R-UT) warned of the challenges the country faces in preserving the country’s status as a reigning democracy. “We are really the only significant experiment in democracy, and preserving liberal democracy is an extraordinary challenge,” Romney said at the Monday event for Cheney, who became a party pariah when she rebuked former President Donald Trump’s attempts to subvert democracy. It has led to a significant primary challenge backed by Trump and House Minority Leader Kevin McCarthy. Romney said the U.S. also faces challenges from authoritarians such as Vladimir Putin, but the strength of U.S. institutions has repelled such forces. As have certain leaders, he said. “People of character and courage have stood up for right at times when others want to look away,” he said, according to CBS News. “Such a person is Liz Cheney.”