#3 Russian football would be the strongest
Ahem. I mean, why not? I am not someone who understands politics. Rather, politics doesn’t really interest me, but even a nonchalant person like me can understand how Trump favours Russia and has often depicted himself to be an “ally” of Putin's.
When Putin sacked American diplomats in Russia, Trump went on to thank him for helping America cut their costs – such is the image that he has exuded this far. So, we can safely assume that if Trump ever becomes the president of FIFA, then Russian football would start gaining power.
As a starter, he could make it a mandatory rule for a Ballon d’Or winner to play in the Russian league for a year at least, which would mean both Messi and Cristiano Ronaldo playing in Russia. Also, with Catalonia wanting independence, he might as well have forced Barcelona to be a part of the Russian Premier League, increasing their viewership in the process.