Donald Trump has spent much of his presidential campaign planting seeds of doubt about the integrity of the voting process, laying the groundwork for challenging the results of the election should Kamala Harris win.
The former president and his allies have boosted their rhetoric in recent months and are already claiming that the Democratic party is trying to steal the election, echoing their attempt to overturn the results four years ago.
In 2020, Trump falsely claimed that Joe Biden had stolen the election, mounting legal challenges and pressuring election officials to reverse the result. His efforts culminated with a mob of violent supporters storming the US Capitol to try to prevent certification of the results on January 6 2021.