What the United States will do depends on who is President, but one thing that needs to be taken into consideration is the fact that we have a lot of extremely large sticks and as long as we have those sticks there is not much that Countries like China can do unless they are willing to take the chance that we will use our Big Sticks and smash their F**cking heads into pulp. And this goes even more for Two Bit Countries like Iran.

Now as to Russia that is a big problem, and what they would do all depends on their leader's mental stability if they are willing to use their Big Sticks against the United States, knowing that we would then use ours against them.