Cystic fibrosis is a birth defect that affects multiple organs. It is cruel, but not surprising that he was turned down. A lung transplant would not have solved poor allen's health problems and would have condemened another person to die in his place.
It has nothing to do with Bush. Stemcell research woudn't even be able to help some one with cyctic fibrosis (its genetic so it would even be in their stemcells). Blaming bush for all your ills is a sick fantasy world that absolves you of responsibility and does nothing to better the world. Support research into gene therapy that will someday help the other 30,000 people who are slowly dying of this terrible disease. Its like balaming the devil for everything bad that happens. You'll never make the world any better that way.