Actually the good thing about if Trump were elected is the democrats might actually believe in checks and balances again and become worried about the executive branch trying to bypass congress. Kind of like when Bush was president and the democrats were rightly concerned with too much power by the executive branch, and even concerned with too much government spending! Obama was against raising the debt ceiling in 06 as a senator. The Left was against the patriot act and other violations of civil liberties then the democrats got the power and that mostly went out the window.

So if trump were to be president I'm sure congress will fight him tooth and nail and won't let him pass anything. He might not even have republicans on his side.