One last point, perhaps the most important one: as the above-excerpted exchanges from the debates make clear, both Obama and McCain understand what "the Bush Doctrine" is and have fundamentally different positions on it, at least as they've expressed those positions during the campaign (whether that would translate into any real differences is a separate question). McCain supports the Bush Doctrine and Obama opposes it. Where is the debate over that fundamental difference? Why isn't the Obama campaign making an issue of John McCain's hair-trigger willingness -- desire -- to start even more wars against countries that haven't attacked us?

... One of McCain's greatest political weaknesses as a candidate is the fact that he's even more willing and eager than Bush was to involve America in new wars -- to start new wars. The virtually complete absence of that vulnerability -- in stump speeches, ads and news reports -- is quite glaring and difficult to understand. The fact that Obama has committed himself to more imperialistic and militaristic approaches than many people would like doesn't negate the fact that McCain has explicitly embraced the underlying premises of the Bush foreign policy -- the Bush Doctrine -- and Obama hasn't. [my emphasis]