I don't see how Brown wins no matter what happens. Even after JD Vance barely campaigned at all and that poor 10-year-old girl had to travel out of state for an abortion, Ryan still lost by over 6 points. It's not happening. R+1.
Tbf, there were things working in Vance’s favor, most notably, low black turnout which is why counties like Moaning, Allen, and Montgomery counties swinging right from 2020 Pres.
Ryan made some of the same mistakes that Joe Donnelly did in 2018 - namely, campaigning as Republican-lite and using Republican rhetoric against the Democratic base, which was a major contributing factor in both of their losses (due to depressed Democratic base turnout). On the other hand, I don't see evidence of Brown having campaigned as Republican-lite in the same way that Donnelly & Ryan did, and as long as Brown continues to avoid doing that, he should be fine as long as he runs a competent campaign and is popular enough.