Not a big surprise. I think this, among other things, would have caused problems for him:
Frist was widely criticized in 2005 for pandering to religious conservatives by injecting himself into the debate over Terri Schiavo, the brain-damaged Florida woman whose feeding tube was removed. Frist viewed a videotape of the woman, then publicly questioned the diagnosis of her doctors. An autopsy later confirmed their judgment, not his.
http://hosted.ap.org/dynamic/stories/F/FRIST_2008?SITE=HIHAD&SECTION=HOME&TEMPLATE=DEFAULT
