Except for the fact of the huge currency swap that is ever winding up between us and China. We buy their stuff export our dollar overseas, they invest those dollars back into our financial markets.
Should that gargantuan bubble of a swap ever break, such as the dollar no longer being the reserve currency, our money and financial assets get dumped at a steep discount. That will likely bring down both us and China, and a better than average chance of the rest of the world too.