One thing that really helped Brazil in this election was compulsory voting. It’s a lot harder to disenfranchise people when voting is mandatory as you can’t just make them apathetic towards voting at all; you need to make them apathetic towards voting for a specific person/party.
I’ve said it a million times before and I’ll continue to crow about it until it’s the norm in all democracies: compulsory voting saves lives. With compulsory voting in the USA the Republicans would basically cease to exist outside of rural areas, because you just can’t win with only 30% of voters backing you.