PHOENIX -- Alec Beaton, 23, has the résumé of a model GOP foot soldier. He's a former precinct delegate and county Republican youth chair who ran a small Michigan field office for Donald Trump's 2024 campaign. He's also a self-described Holocaust "revisionist" who views praise for Adolf Hitler as a way to "mess with people." "We don't think Hitler is, like, the worst person ever," Beaton explained as he roamed a national conference for young conservatives with his friends, joined at one point by an acquaintance on the event staff for the host group, Turning Point USA. Many Republicans dismiss...