The OPEC countries can only cut so much, and then they will start going broke. For many, if not most, of these countries this is their only source of revenue. If they don't sell oil, they have no money. If US could get all of it's supplies here in the US, it really doesn't matter how much they cut their own throats trying to raise prices, instead they will start pumping more and bringing down the prices to try and regain market share. They don't have as big of a stranglehold on the worlds market as they once did, and they have gotten used to getting all of that money and spending it.