The ONLY WAY that Obama got the ACA through Congress which past presidents had tried and failed (and admittedly it needs repair) is that it got through towards the end of the first two years of his first term when he had the Congress .....(and right before the midterms) 

I think history will suggest that this is the window of opportunity for presidents....and they should use it...perhaps for a major infrastructure program....or ? Or?

It's NOT an opportunity to waste....

What is probably more likely to occur is that the House will remain Rep...but perhaps by a more limited number and Ryan will need to work more collaboratively with the Administration......