Earlier quoted context omitted.
In all honesty: almost none. He just wanted to be president. Most of his time will be spend enriching himself by selling banal access and bloviating on the world stage. That's pretty awful, but not apocalypse-level awful. Of your list: The wall is a technical impossibility that everyone can recognize. There's no funding for a deportation force and the political optics of goon squads rounding people up is something co…
I don't think you understand how ego works. He wants to be more than just president, he wants to be a great president, that's in his nature. I truly believe he'll do what it takes to make himself into a great president. Do you think he wants to be remembered more as a George W. Bush or a Ronald Reagan? I'm about as worried about a Trump presidency as I am worried that I'll remember how to breath at night. Human Natur…
The man, by his own account, doesn't read books. He gets his information from cable TV. He has the attention span of a gnat (couldn't be bothered to prepare for the debates; it showed). This is the man, back in 1984, who wanted to be the one to handle the nuclear arms negotiations with the Soviets. "It would take an hour-and-a-half to learn everything there is to learn about missiles."[1] In 2016 he didn't know what the nuclear triad was.
His gaffes on foreign policy the last year and a half include: suggesting that the national debt in negotiable, support of Nato allies is not guaranteed, Japan should get Nukes, countries in Asia should feel free to nuke each other if they want to, "if we have the nukes, why can't we use them?". Those are just some of the things I can remember off the top of my head.
The best we can hope for is that he gets bored being a president very quickly and doesn't screw up too much in the meantime.
His entourage doesn't exactly inspire confidence either.
[1] http://www.nationalreview.com/corner/433623/donald-trump-col...