When Trump supporters stormed the Capitol a year ago, they were motivated in part by what some analysts and authorities call "the big lie." It's a conspiracy theory embraced by former President Donald Trump that claims the 2020 presidential election was stolen by Democrats.According to one poll from Monmouth University, nearly three-quarters of Republicans believe Biden's 2020 election win was illegitimate. Republicans' belief in the stolen election has become a litmus test for the party. As part of our week-long series on Jan. 6, we're diving into how the GOP got here and what this means for the 2022 midterm election.Want to support 1A? Give to your local public radio station and subscribe to this podcast. Have questions? Find us on Twitter @1A.