Oh, and that national debt? We lied--we're never paying it back. And you can't keep calling to bug us about it. Because Geneva Convention

your not paying it back? no problem, then we won't loan you money anymore.
unfortunately for you, you need the rest of the world to loan you 40.5 billion USD every month or else you can't pay for your imports.
http://www.tradingeconomics.com/united-states/balance-of-trade