Republicans aren’t guaranteed to hold states like NC or MT even if Trump wins reelection (at least CO + NC + AZ is easily doable even if Trump wins), and knowing Republicans, I’m sure they’ll find a way to blow one "safe" race in red territory (maybe AL with Moore, maybe KS, maybe AK, who knows).
I know it’s a controversial opinion, but I also think that MI-SEN will be fairly competitive if Trump wins reelection and James is the nominee.
LOL if Trump is winning NC, tillis will win too. Tillis would have to do something really dumb to lose if trump wins NC