So US will end up being isolated from the world. Nothing in, nothing out (or at least a decrease). This requires self-sustaining economy, and over 300 million people. If both Russia and China back down... Also many economy dependent on US (thanks for screwing everyone over), for example Mexico and countless countries in Pacific islands. The rest can have a good rest or let China and Russia fight it out. Well Trump is going to provide some perfect opportunity for my plans to go along.