holding hearings, and gathering evidence to fully expose what the committee says was a plot designed to keep donald trump as president in 2020. and to try to make sure it can never happen again. what's the bottom line you want the american people to know from these hearings? >> there are several things, but one is that there was a very sophisticated, multi-part plan, overseen by donald trump, to attempt to overturn the election. no president in our history has ever done anything even close to that before. >> reporter: vice chair liz cheney, one of just two republicans on the committee, has spent the last year bucking her party and helping investigate donald trump's sophisticated multi-part plan. the first piece the committee focused on were the lies. >> mail-in ballots is a very dangerous thing for this country because they're cheaters.