Then there’s Andrew Yang starting to a 3rd party. I don’t think many like his alternative, but it still peels away people from the larger two
There is also a lot of hate among the Left for Green candidate Jill Stein, even though “climate is so important”
Bernie still has large support among the Dem party voters and has had so much conflict with DNC, that the GOP just has to make some concessions to Bernie to end the Democrat party. Of course they are not flexible enough to make this happen, but it is simple solution to do