Via the ballot box.
I am sure this is how Republicans felt when Obama provided the dreadful Affordable Care Act and turned America's lazy losers into people entitled to healthcare, thereby robbing the wealthy of a small slice of their surplus income.
America was turned into Europe on that day!
This too shall pass, but it's looking like being a fairly barren few years for new legislation. If they can't subtract the laws introduced by Obama, it's a win. I very much doubt Trump will win again, so long as the Dems find a strongish candidate.