The 2020 U.S. presidential election was one of the most contentious and polarized in recent history, culminating in a significant portion of President Donald Trump's supporters believing that Joe Biden won the presidency through fraudulent means. This belief among Trump supporters can be attributed to several factors, including claims of election fraud propagated by key figures within the Trump administration and its allies. Despite the absence of evidence substantiated by courts or election oversight bodies, the narrative of a "stolen election" gained traction, fueled by a barrage of lawsuits and public statements challenging the integrity of the electoral process. The widespread dissemination of these claims through social media and certain news outlets played a pivotal role in shaping the perception of illegitimacy surrounding Biden's victory.
Another reason why many Trump supporters believe Biden cheated involves concerns over mail-in voting and electoral rule changes. The COVID-19 pandemic necessitated adjustments to voting procedures in many states, leading to an unprecedented reliance on mail-in ballots. Critics, including President Trump, argued that these changes increased the risk of voter fraud and that the system was inherently less secure than in-person voting. These concerns, amplified by anecdotal reports and isolated incidents of procedural errors, contributed to a deep-seated mistrust in the election results. The fact that election night did not yield an immediate winner and the subsequent days saw a shift in the lead from Trump to Biden, as mail-in votes were counted, further fueled suspicions among Trump's base that the election was being manipulated.
Finally, the polarization and deep division within the American political landscape cannot be overlooked as a contributing factor to the belief among some Trump supporters that the election was stolen. The years leading up to the 2020 election were marked by significant political and social unrest, which entrenched partisan viewpoints and fostered an environment where conspiracy theories could flourish. In this context, the narrative of a stolen election served as a rallying cry for those already predisposed to distrust the political establishment and media institutions. The culmination of these factors — amplified claims of fraud, concerns over mail-in voting, and a highly polarized electorate — created a fertile ground for the belief that Biden's victory was not legitimately achieved.