If we take the Senate and the House, be clear, it wasn't that Democrats are back. It's just that for this moment, the American public decided they hate Democrats less.
This kind of magical power that Trump has to get voters to walk on glass to vote for him who might be irregular voters otherwise has never really carried over to the midterms or to other types of elections in the Trump era.
So ordinarily, there's a lot of cooperation between the federal government and state and local governments in terms of administering elections. Now we have this very different situation where the states and localities are seeing the federal government as kind of an adversary that's been threatening state and local election officials with prosecution if they don't adequately police their voting rolls in ways that the Trump administration wants.