A large part of the reason that the U.S. stepped into the Gulf War was to keep the region stable, because instabilities in the major oil-producing countries tend to have a negative effect on the economy of America, and indeed the world. It's not necessarily that Bush plans to occupy Iraq and leech every drop of oil from the sand, simply that the economic impact is taken into consideration. As I said before, simply ending the embargo would provide considerable gain for U.S. oil companies.