EXCERPT Though neocons formed a kind of Praetorian Guard around John McCain during his campaign, their truculent approach to foreign affairs sabotaged rather than strengthened McCain’s appeal. The best that Sarah Palin, a foreign-policy neocon on training wheels, could do was to offer platitudes about standing by Israel. It seems safe to say, then, that the neocon credo is ready to be put out to pasture. Or is it? One problem with this line of argument is that it’s been heard before—sometimes from the neoconservatives themselves. In 1988, after George H.W. Bush replaced Ronald Reagan, neocon lioness Midge Decter fretted,...