Sen. Mitt Romney Willard (Mitt) Mitt RomneyBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power The Memo: Trump's strengths complicate election picture MORE (R-Utah) in a Sunday CNN interview criticized President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's moral leadership of the U.S.

"I think he could substantially improve his game when it comes to helping shape the character of the country," Romney, a frequent critic of the president, said on CNN's "State of the Union."

"I think young people, as well as people around the world, look at the president of the United States and say 'does he exhibit the kind of qualities that we would want to emulate?' And those are qualities of humility, of honesty, integrity," he added.

"The president has distanced himself from some of the best qualities of the human character.”

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Romney, a former GOP presidential nominee, and Trump have publicly feuded over issues including Trump's insults of the late Sen. John McCain John Sidney McCainThe Memo: Trump's strengths complicate election picture Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' Cindy McCain: Trump allegedly calling war dead 'losers' was 'pretty much' last straw before Biden endorsement MORE (R-Ariz.).

The senator has said he did not vote for one of Trump's judicial nominees because of his attacks on former President Barack Obama Barack Hussein ObamaThe Memo: Trump's strengths complicate election picture Obama shares phone number to find out how Americans are planning to vote Democrats' troubling adventure in a 'Wonderland' without 'rule of law' MORE.

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