Granted. Trump instead switches places with Vladimir Putin, who becomes the new US president due to the Westboro Baptist Church, the KKK and some random Neo-Nazis deciding to sabotage the elections all at the same time. Meanwhile, Trump becomes the Tsar emperor dictator president of Russia, and manages to drive the entire country into a massive financial crisis, causing China to decide "Now we can be rid of Russia" and conquer it in seventeen days. Soon, a new Cold War starts between the US and China.
I wish that all of the above would have zero chance of ever happening.