On October 24, 2006, Warner was in a political advertisement against a proposed law in Missouri. That new law would allow embryonic stem cell research to be done in Missouri. Warner was in the advertisement with James Caviezel, Patricia Heaton, Jeff Suppan, and Mike Sweeney. The advertisement, which was played during Game 4 of the 2006 World Series, falsely alleged that Amendment 2 would allow human cloning. The advertisement came after a pro-embryonic research advertisement that had Michael J. Fox, who has Parkinson's disease, in it.