I'm supporting Biden, but I vote in Illinois so it doesn't matter much anyway. I guess I'll vote for Mark Curran in the Senate race, though there's no way he's beating Dick Durbin. I think the House candidate is a QAnon truther, but Bobby Rush kind of sucks, so that one will be blank. Again, the district is something like D+25.
Only for a couple local races where no Democrats are running. I voted for a Republican Congressman in 2016. But those days are long gone.
Which one? Illinois has a history of sending good Republicans to Congress. The Dirksen and Cannon congressional office buildings are both named after Illinois Republicans!