George W. McCain, aka Mad Bomber McCain, beats his chest and threatens to bomb Iran and invade Ecuador. McCain never saw a target of opportunity he didn't like. As a fighter pilot in Vietnam, he complained that his superiors wouldn't allow him to bomb Russian ships in Hanoi harbor. (Thank God he followed orders!)
If McCain is elected, he will escalate the war. Despite protestations to the contrary, McCain loves war (and defense contractors). The problem is that Dubya has so badly broken the army that there isn't a unit at full strength and ready to deploy. Say, for example, trouble erupted along the demilitarized zone in Korea. How would we reinforce our troops? Since it's doubtful the college Republicans would step up to the plate, I guess we'd have to send the Boy Scouts. The alternative would be to reinstate the draft, but this would cause the "my, me, mine" generation to riot.
McCain's Vietnam experiences were unfortunate, but at least he came back. Being an ex-POW doesn't necessarily qualify one to be president.