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While Romney is not expected to attend, his wife, Ann, is scheduled to be there.

Duvall is a longtime Republican supporter, and was a guest of President George W. Bush at his first inauguration. During the 2008 campaign, Duvall provided voiceover work for some of the videos appearing at the GOP convention, and campaigned with Sen. John McCainJohn McCainCoats: Trump seemed obsessed with Russia probe The Hill's Whip List: Senate ObamaCare repeal bill Meghan McCain slams 'felon' Dinesh D'Souza over tweets mocking father's captivity MORE (R-Ariz.) in New Mexico.