I'm not quite as pessimistic as you. I think the GOP holds the Senate, and maybe picks up a seat or two. But it won't be a nearly as big a win as it might have been. I think the House is in far more danger. The Republicans in states like New York, New Jersey, Illinois, and California could pay the price for their vote on the tax plan. About the only thing that might save it is the idea of a Speaker Pelosi again. If the Democrats were smart she'd step down from the leadership and allow a fresh face to be considered as Speaker. But I don't think they're that smart.
I hope you are right. I hate when we lose in places like oklahoma and Iowa. Yes very small elections with under 2 grand voting but to lose a seat after 40 years is ridiculous and its happening all over. I think the tax bill is dead.