As I wrote last week, in John McCain's recent television ad focusing on global warming, he frames his position as a pragmatic "middle way" approach between the two extremes of denying there is a problem and resorting to heavy taxation and regulation. The ad even ends by offering up the complementary frames that global warming is in fact a national security problem and involves a moral duty to future generations. Perhaps most notably, the ad opens by using imagery of more intense hurricanes,...