Well, the word is that he handed a pretty solid victory to the Democrats, in that when the debt ceiling comes back up again in December, the Dems will have a lot more leverage to get things that they want passed.
https://newrepublic.com/article/144726/trump-screwed-republicans-now-what
Faced with the perennial debt ceiling problem, Trump shocked Washington on Wednesday by agreeing with Schumer, the Democratic leader in the Senate, and Pelosi, his counterpart in the House, to fund the government and raise the debt limit for three months while also providing aid for Hurricane Harvey victims. To call this a “deal” would be generous, as Trump gave Democrats exactly what they had sought. The agreement keeps the debt ceiling issue alive ahead of next year’s midterm elections—giving Republicans ample time to shoot themselves in the foot with infighting over government spending—and provides Democrats with leverage in future negotiations on key issues like granting legal status for DREAMers.