"Inside four years there will be a totalitarian regime in USA. If Trump is still alive and kicking then he will rig the elections so that he can remain President; unless he manages to alter the US Constitution so that he can be the emperor for life. What I say sounds ridiculous today." The reason I wrote it today is because I want all those that ridicule this post to come around and read it in four years. 
North Americans take democracy, its institutions and conventions for granted. They were born with it and they think democracy is unassailable. Just go ask 90% of world's population, and then analyse what Trump has done so far during the campaign and since he became president-elect. Then come and explain to me why you are not concerned.