If the election were held today, I can confidently say with 100% certainty that Dems would pick up 17 seats in the house and GOP would pick up 2 in the senate. Kansas would stay all red (plus a KK win). Anything can change in the next few months, but my prediction of what would happen today is absolutely correct.
Trump is going to campaign like a Tasmanian Devil the next few weeks because (a) he loves it, and (b) it helps the candidates.