More deviants from conservatively correct thinking have been purged by the Bushies, as Eugene Volokh reports:

The Bush administration has removed two members of the bioethics advisory council-- two who favored stem cell research.

The two were a medical ethicist and a biologist. They've been replaced by a neurosurgery specialist; a political theorist with a University of Chicago connection who writes about Montesquieu; and a political theorist who has started to do some work on biotechnology.

Volokh suspects the replacements are followers of Leo Strauss, widely regarded as a major intellectual inspiration to foreign-policy neocons:

Both of the political theorists have institutional affiliations that identify them as Straussian with a high degree of confidence, and both are established critics of biotech in general or stem cell research in particular-- giving us some ex ante reason to think they were chosen by Straussian Leon Kass, my colleague at Chicago and the chair of the council. I'm all in favor of political theorists with University of Chicago connections who write about Montesquieu, really I am. But these changes have the clear intent and effect of making the advisory council more intellectually homogenous and less likely to air any dissent from Kass' essentially religious and anti-science views....

Volokh's source is this article from the Chronicle of Higher Education, which you can read if you're a subscriber (I'm not). (Thanks to Pandagon for the link.)