Jim Fossett pointed me to this Rick Weiss piece that makes it clear that Bill Frist has never been under more pressure than he is right now. Stem cells will be the only key test of where his mind and guts are, and his opponents could not have picked a better issue to put him in a box. Here’s one of the best transplant physicians of his time asked to push the U.S. government as a whole forward toward the future of transplantation – cell transplantation – without ruining his relationship with the conservatives he believes might support him in a presidential run.