In the two weeks since I first wrote about the human-cloning amendment on the ballot in Missouri, the debate has really heated up.? Actor Michael J. Fox grabbed headlines by taping a TV ad asking voters there to approve Amendment 2. The amendment is designed ?to ensure that Missouri patients have access to [embryonic] stem cell therapies.? These therapies, we?re led to believe, will bring cures for terrible diseases such as the Parkinson?s that, sadly, has stricken Fox and many others.Then the ever-brave and straight-talking Rush Limbaugh spoke out against this ad, surmising that Fox had deliberately gone off the...