ED KOCH identifies himself with pride as a lifelong Democrat. The former New York City councilman, congressman, and three-term mayor says his values have always been those of the broad Democratic center -- the values of FDR and Harry Truman, of Hubert Humphrey and Daniel Patrick Moynihan. He disdains the Republican worldview as cold and unfeeling -- "I made it on my own, and you should, too." The Democratic philosophy, by contrast, he sums up as: "If you need a helping hand, we'll provide it." No surprise, then, that Koch disagrees with George W. Bush on just about every domestic...