MAGA adherents deny and dismiss what they are a part of, but they believe Trump’s lies, and will support him until the end. At a rally just outside Atlanta in late October, thousands of Donald Trump supporters lined up in the punishing southern sun to see their hero; some had driven hours from out of state. Vendors hawked T-shirts with slogans such as Say no to the ho, and Roses are red, Hunter smokes crack, Joe Biden has dementia and Kamala isn’t Black, sometimes chanting the phrases out loud to amused onlookers. Hundreds of people still standing in the winding...