Craig,
Get the opposition picture from the oppostion… Either request publicity stills from their PR people, or shoot one of their posters. Are they gonna say, “we distributed thousands of these pix, but only friendly media organizations can use them???”
Their own key art typically are the shots that work best anyway, because you’re turning the tables on them by attributing new meaning to something that people already recognize. The public usually appreciates that as an indicator that your candidate is smart and has smart political strategists on his team. Of course, that can backfire if you’re not careful about what you say…
DRW