Middle East problems.
If it comforts you to think this is all about Bush making a few bucks in the oil industry, you go for it. There's a guy who is convinced that the Queen of England is an alien lizard--I suppose that makes him happy too.
If we beat Iraq, the Middle East oil producers are going to be lining up to kiss our Army boots. Who else do they think is going to buy their oil? And there's a hell of a lot of other places willing to sell us oil.
Iraq burned the Kuwaiti oil fields as they retreated. Don't remember having trouble finding gas back then.