Trump predicted in 1997 scifi novel Titan by Stephen Baxter
Maclachlan was inaugurated in 2008 after his wafer-thin win in the 2008 election. Maclachlan called it a liberation of the capital.
Armed militia bands came in from Idaho and Arizona and Oklahoma and Montana, to fire off blackpowder salutes to the nationalist-populist who promised to repeal all gun laws.
...
Army engineers set in place during the handover from the last administration started to build a wall, two thousand miles of it, along the Mexican border, to exclude illegal immigration. While it was being built, troops brought home from peace-keeping abroad were operating a shoot-to-kill policy.
...
He had raised tariffs ten percent against Japan, fifty percent agains the Chinese and world trade collapsed. The Chinese, particularly, screamed. And so Maclachlan sent the Seventh Fleet to a new station off the coast of Taiwan.
https://whyevolutionistrue.wordpress.com/2017/11/28/more-prescience/
There's more - too much to fit into 4 paragraphs. Baxter just went 8 years too early.