Trump presidency will not last four years. I don't think it will last even a year. The way this is going the first shots will be fired sooner or later and I'm not sure how many sides the second US civil war will have but it is coming and it will be soon.
(Granted that I would not be surprised if Trump's side will win the war but I'm sure they'll think of a new title for him when he rules the YUGE STATES OF MURICA.)
EDIT: and that Australia thingy. The most offensive part of this, in my mind, is how Trump is really using newspeak. "Do you believe it? The Obama Administration agreed to take thousands of illegal immigrants from Australia. Why? I will study this dumb deal!"
Note, "illegal immigrants." He is talking about refugees and lumping them together with the people who cross the border illegally. This is despicable.