Stem cell research is not even on the radar screen of most votors. The few that do have strong feeling one way or the other are still not likely to change their vote because of it. The issues that will shift votes this year will be Terrorism, War in Iraq, and the economy. This just isn't a "social issue" election year. No major social issue is really on the radar screen, How much talking have you heard either candidate do about gun control, abortion etc. The only social issue I can think of that is even remotely on the radar screen is gay marriage and that heavily favors Bush.
This election is (or should be) about one thing, and one thing only: The fact that there remains a strong contingent of terrorists at large who have dedicated their lives and deaths to overthrowing our government and annihilating me, you, President Bush, and Ron Reagan Jr. alike. They do not discriminate. And if they have their way, you can forget about "stem cell research," or "global warming" or "assault weapons bans," or whatever you favorite liberal distraction be, for all time to come.