Trump has lost the House, but he keeps the Senate.
This means that he retains control over the law-makers, but will have to fight to get some of his legislation programmes through.
They House may now insist on the disclosure of the President's tax affairs, something he promised at election, but one promise he has yet to fulfil.
Overall, Trump will be delighted - sensible politics, in other words politics conducted by those other than Trump is about picking your battles, and negotiating the best result from the ones you can't win.
But Trump loves battles, it's the way he lives and works. He treats politics as though he is negotiating one of his property deals, and that means hammering the opposition into submission - so for him personally, it remains business as usual.