There is a crapload that can be done. I've counted 16 concepts, and more solutions bubble up daily. Below are ideas I've seen here before.

For example, you don't have to take down that horde in the way that you're thinking. All that's needed is wifi, cell, and sat jammers. They'll be bored of the Chrome Dino after they beat their high score, and leave.

A simpler solution is to rally around the American race. That could literally pop up tomorrow.