

Until very recently, Republicans had an edge in mail-in voting, however after Trump started deriding it, a not small number of Republican voters stopped using it.
Also skewing the numbers is that Deonacratic-led states largely allow everyone to vote by mail if they’d like, whereas Republican-led states strictly limit mail-in voting to people who meet certain criteria. This means that Democrats are overrepresented when you look at a national count. Oregon and Washington don’t even have in-person voting, only vote by mail. Republican-led states limiting mail-in voting predates Trump though, because they try to limit anything they can related to voting.








Afaik mail-in ballots were not the deciding factor in the 2020 election, which Trump lost handily. He was never ahead on election night, though that wouldn’t stop him from claiming it