MUCH HAS BEEN made of the Republican National Committee’s decision to showcase the moderate wing of the party from the stage at Madison Square Garden this week. Hence speeches by Senator John McCain and former New York mayor Rudy Giuliani on Monday night, and by California governor Arnold Schwarzenegger on Tuesday. And no invocation by Franklin Graham, Jerry Falwell, or Pat Robertson. The president, understandably, wants to avoid a Pat Buchanan–esque moment of the sort that marred his father’s convention in 1992. (Buchanan’s prime-time rant about the "culture war" was so extreme that Molly Ivins quipped it was better in...