For the answer to that, look at the regulations, the time required, and the expenses of adopting an American baby with adopting somewhere else.
That’s been my theory why Bill Gates and others choose to spend their fortunes on charity work outside the borders of this country. Who needs to deal with regulations, lawsuits, greedy interest groups in the US?! The corruption in the Third World is so much more straight forward and easy to deal with, and your reputation stateside doesn’t suffer a bit.