Eh, Churchill was an outright imperialist, which generally doesn't count because the winners wrote the history. The one war he really did want was with Hitler and given what Hitler did do his instincts proved to be right (and of course he wrote the history of that war to favor himself as it was). Ironically had the will to war existed earlier Nazi Germany would have been destroyed in about six months, Chamberlain waited a year and we all know how that wound up.

McCain's just an unscrupulous old man wanting to be in office until he dies.