So, it is beginning to set in. A large percentage of the US population is stupid enough to vote this manipulative lunatic into office. If this is the case what, realistically, is going to happen? Would the Democrats in the Senate/House pull the classic Repub tactic of voting no to everything? Would "the Wall" get built? What about the social/ethnic/religious minorities that Trump continues to demean to the cheers of the extremists at his rallies?
Trump supporters and apologists need not apply given the forum that this post is in. Also, I would like to focus on Trump and not subscribe to the knee jerk reaction to undermine the post by trying to bring up Hillary. Thanks.
(Hides red flag as enters liberal forum)
for what it is worth I think you're looking at an American Putin rather than a "Hitler"; A populist hard man, who lacks a coherent totalitarian ideology to have a one-party system. If it gets really bad, maybe it will look like China today- a cocktail of authoritarianism, corruption, runaway free market economics and corporate abuse of power.
Trump will easily be worse than Bush. It's hard to see how it won't inflame existing tensions leading to nationwide race riots, outbreaks of domestic terrorism and a NSA police state with mass survialliance, Internet censorship and possibly even the sort of "cheerleaders" they use on the Internet in China to promote the Party line. Although the media will probably do that anyway based on their behaviour under Bush even without the threat of libel laws being used to censor criticism of the president.
If he actually tries to deport all the illegal immigrants and builds the wall, with camps of illegal immigrants awaiting deportation patrolled by armed guards- we'll miss the days when FEMA camps were a figment of the far rights over active imagination even if we call it "free speech zones". Political opponents may start to disappear once the infrastructure to do so is in place as the culmination of increasingly divisive rhetoric and expansion of government powers.
However, the worst part is that irrespective of anything else, a Trump presidency would virtually close the window to prevent catastrophic climate change (without revolutionary technologies to reverse or stabilise it), relegating even the meagre promises of the Paris climate talks to history and my and future generations to war, famine and other fun stuff I really don't want to think about. That was probably going to happen anyway but electing Trump means offically the deniers have won and we should write the rest of the century off. (Note: the lag on climate change if we stop polluting overnight is estimated at two or three hundred years before temperature stabilisation so this easily has inter generational and historical impact that compounds existing failures).
Trumps foreign policy will probably make North Koreas behaviour look like a reasoned and proportionate response to the dangers of US imperialism and ISIL will no doubt continue to flourish with the U.S. Doing all the radicalising on their behalf by bombing random places in effort to look "tough" but really just making the situation a lot worse. U.S. Allies will be pretty much left to fend for themselves if The U.S. Leaves NATO or starts demanding they pay for U.S. bases.
On the flipside, you may have a large scale public works programme (not just the wall) and advance LGBT rights (his positions indicate those are possible) assuming the U.S. Is still standing to actually enjoy them. It is worth looking at his political positions page on Wikipedia even its not reliable given how much he changes his positions.
I'd consider all of the above an reasonable "average" of my expectations of a two term presidency (like Bush junior and Nixon). If the American people can do it once they can do it twice. I will save the worst case scenario for using nukes and US government default and the next Great Depression with 100% authentic nazis for some other time.
P.s I just realised I forget the ban on Muslims! Forgive me, but I need to go and hide in a dark corner and wait for the american drones to come and get me.