Once conspiratorial thinking becomes part of someone’s partisan identity, it can spread. In high-profile statewide races in Georgia, Ohio and Arizona, leading Republican candidates have embraced the false claim that the 2020 U.S. presidential election was stolen, often reversing their previous statements to do so. Despite a complete lack of evidence for the claim, this belief has become widespread among Republican voters and shows no sign of diminishing. Believing that elections are rigged reduces trust in democracy and democratic norms, research finds. While there’s nothing new about partisans believing that elections have been stolen, it is new to have so...