If I were predicting right now... the GOP will take the house, albeit by smaller margins that some had hoped for and it would appear that the Senate will boil down (once again) to a possible Georgia runoff.
Kelly pulls off Arizona (as judges refused to keep polls open in spite of the early day issues and long lines). Fetterman may end up holding on as well in Pennsylvania. I would still expect Laxalt to win in Nevada (although that is also currently running closer than polling suggested). But Fetterman and Laxal both winning would basically just wash everything out.
Right now Walker is projected to win by a smallish margin, but probably not by enough to avoid a runoff. If things hold as they are right now, the Republicans are in danger of hoping to stay at 50-50 and in danger of "losing" a Senate seat.