Actually international relations are not a game. Countries respect each other and play their roles. The USA and Russia are 2 super powers. For that reason, their relationship influences other countries. For sure, they are not good friends. But in any case, they cannot be enemies as well. It is very important for the balance of our world. Both countries are super powerful. They can destroy our world in case of war. We do not need this. They provoke each other. Leaders of both countries are not angel. In that case, it is hard to say who is good and who is bad. I believe they are just teasing each other. In a  way, it is a kind of concurrence. It is also good for the development of military and army technology.