The real story will be that the GOP will pick up a dozen House seats.
All these polls are garbage.
I, too, believe the GOP will pick up seats in the house contrary to what we've been lead to believe. Trump has kept the focus on the biased media and corruption in the DOJ/FBI, an effective form of "shaming" that will keep democrats home or convert them.
In contrast Trumps base is invigorated by the media's total loss of any resemblance of objectivity. Now that his supporters know what he's about and has demonstrated, this will encourage their turnout.
I cannot venture a guess on the totals, but he'll keep the House and make needful gains in the Senate.