Trump's arrogance has cost us dearly. He has been complaining about voter fraud since he lost the popular vote to Hillary. That was the foundation for the Big Lie, because right-wing media echoed his claims faithfully to the point that about 30 percent of our population believes the only reason Biden won was through voter fraud. As you say there have been numerous legal challenges--all failed and most recently the partisan Cyber Ninjas finally conceded that Biden received 100 more votes than he started with before the Arizona Audit. However the Big Lie persists and our system seems to have no way to lay it to rest.