I think a bigger question mark is whether or not the US will approve VISAs for specific visiting teams. Obviously FIFA is a big organization and everything in the US operates on money and how much of it you have, but what prevents them from just flat-out not providing VISAs to, say, Iran, or Mexico, or Canada?
It's unfortunate that protest is the only tangible way forward but protest will also lead to the military and brownshirts on their streets shutting them down. Protest is what the administration wants, and it's going to keep cutting people off at the knees until they get to that point. Who knows what happens with the World Cup next year - who knows what will happen next month? They're quickly approaching a Reichstag fire moment; perhaps they don't even need one.