U.S. intelligence agencies have identified domestic extremists with grievances rooted in election-related conspiracy theories, including beliefs in widespread voter fraud and animosity toward perceived political opponents, as the most likely threat of violence in the coming election. …Former President Donald Trump has claimed elections have been rigged against him since 2016, when he won the Electoral College but lost the popular vote. In 2020, he and his allies ramped up false claims of cheating — lies the courts quickly struck down — but the claims became fuel for a violent attack at the Capitol, which aimed to overturn the election....