He's been owned by the Bin Ladens ever since the '80s when they bailed out his Arbusto oil company. Guess they told him, NO.
Unless the puppet-massa Cheeney forbade Bush from doing anything that didn't make a big profit for Cheeney's friends.
I don't mean to be rude, but where have you been? Don't you know anything about the Bush family and their dirty dealings over the past 80 years?