+4 Senate and -40 House is my prediction too.
You don’t get that easily, but this is the year you can get it.
There is a very strong swing in sentiment and enthusiasm of Democrats in the Northeast, California and suburbia elsewhere. Many, and if it’s bad, most of the Republicans House representing districts that Trump lost or narrowly carried are going to lose.
It so happens in the Senate that Democrats are disproportionately defending seats in states that Trump carried by a fair margin, and Republicans are defending almost no Senate seats in states that Clinton carried. Also, Trump is more popular than ever in rural districts and in red-state exurban districts and that will actually increase the vote for Republican Senate candidates in close statewide races, but do nothing for the House results, given that those voters reside in already-safe Republican House districts.
You are out of your mind. You don’t lose Senate seats and lose 40 House seats. There is no big enthusiasm for Democrats in Republican held districts, which are the ones that Democrats have to flip! Check out the information from those Districts!