Alot of the comments above are confusing the FDA with Congress. The only interaction they have is that the FDA gets to spend the money that Congress doesn't take from them and then they (the FDA) is on the hook for anything (approval) that goes wrong. I can understand the FDA being hesitant, they don't get to use all the money they work for and then they are responsible for the mistakes (sometimes unpredictable) that they are too understaffed to handle. Also, the state of the art in stem-cells is than ideal. As a matter of fact, the adult stem-cell progression is far above embryonic and has more hope to it. Politicians have only been demagoging embryonic sc's just to get donations. Right now at least, adult stem cells are further along and are more likely to succeed. There is however embryonic SC research ongoing, it just not as hopeful and that's why you don't hear about it as much.