I’ve had the same thought a few times, it’s normal.
Although polls are open typically 8 am to 8 pm +/-, there is lots of voting around midnight. Probably more so if that’s a night with a full moon.
Nobody knows. There are signs in both directions. The generic ballot looks great, but that measure can fluctuate wildly towards the end.
My main concern is that quite a few GOP House candidates are weaker now than earlier in the year. Wahlberg, Atschuler, Hanna, Barletta and Meehan come to mind.