A year after President Joe Biden’s inauguration, more than two-thirds of Republican voters believe his election was illegitimate, and the idea that the 2020 election was stolen from Donald Trump is now a defining issue of the Republican Party. In a new investigative collaboration, FRONTLINE and ProPublica trace the hidden sources of disinformation about the 2020 election, demonstrating how a handful of people have had an outsized impact on the current U.S. crisis of democratic legitimacy.

Air Date: Tue, Mar 29, 2022 10:00 PM