It would be very odd for Chabot to lose now when he has survived much tougher situations in the past. Unless there's a personal scandal of which I am unaware, I would place this race as Likely GOP.
The generic worry for OH is the bad state of the OH GOP, which could adversely effect our candidates. Whatever we lose there in November, most of the blame will likely be rightly laid at the feet of Boob Taft.