Attempts to overturn the 2020 United States presidential election

After Democratic nominee Joe Biden won the 2020 United States presidential election, Republican nominee and then-incumbent president Donald Trump pursued an unprecedented effort to overturn the election, with support from his campaign, proxies, political allies, and many of his supporters. These efforts culminated in the January 6 Capitol attack, described by multiple sources as a self-coup d'état attempt.

Source: Wikipedia — Attempts to overturn the 2020 United States presidential election (CC BY-SA 4.0)