When asked which single issue most affected their vote in the last presidential election, more than one in five Americans said "moral values"--and 78 percent of these voters chose to reelect President George W. Bush. Indeed, Christian fundamentalists made up close to 40 percent of the president's electorate in 2004, and their turnout increased by some four million voters over 2000. As Esther Kaplan shows in her richly detailed investigation,...