Claire McCaskill's campaign in Missouri began running an ad that features Michael J. Fox last week. Transcript:
As you might know, I care deeply about stem cell research. In Missouri, you can elect Claire McCaskill who shares my hope for cures. Unfortunately, Senator Jim Talent opposes expanding stem cell research. Senator Talent even wants to criminalize the science that gives us a chance for hope. They say all politics is local, but it's not always the case. What you do in Missouri matters to millions of Americans. Americans like me.
YouTube video (0:37)