Consider how much Bush, Obama, and Trump have done through executive orders. Since the Nixonian period we have been living in the Imperial Presidency era. Yes, there are swings back and forth between the Executive and the Legislative branches, but right now the swing is towards the Executive. Not to mention the Executive's power to nominate judges. That in itself is going to help remake the US for at least a generation given how many nominees have been approved on the Circuit and Appellate courts.
I don't think you understand how much of a danger I consider Sanders to be. Yes, I would vote Trump over Sanders.
I might end up supporting Bloomberg or Biden over Trump. But I would never support Sanders over Trump. I can definitely see that there are parallels in the world/US right now to the Weimar period where the extremes on both left and right are gaining support due to a number of factors. And I consider myself a centrist. As such, who do I think is closer to the center in the US? That would be Trump over Sanders.
Just think about me this way. My natural political home doesn't exist in the US anymore. It used to be Rockefeller Republicans - fiscally conservative/socially liberal. In Germany it exists though. The FDP.