Stem cell politics

The lede:

The next president will be faced with the question of whether to overturn President Bush’s 2001 executive order banning federal research funding for new human embryonic stem cell lines.

Sens. Barack Obama (D, Ill.) and John McCain (R, Ariz.) have pledged to overturn Bush’s restrictions. But prominent supporters of embryonic stem cell research have raised concerns about what they see as mixed signals from the McCain campaign.

The whole shebang.