The full-page ad in the New York Times featured head shots of Jerry Falwell, James Dobson, and Pat Robertson. Above them, in giant type, were the words, “Meet America’s Most Influential Stem Cell Scientists.” The ad charges evangelicals with trying to turn America into a theocracy and outlaw scientific research. This ad was one of many hysterical, vicious, and untruthful ads paid for by a group called the Campaign to Defend the Constitution, or “DefCon.” But far from defending the Constitution, DefCon, which does not have to report who they are or who is paying for these ads, is an...