I was talking to someone about an assignment they were given to photograph Brad Pitt and how he figured out where generally to take the photographs, then specifically, then in detail - the head, the hands, etc. Sort of like zooming in from outer space on Google Earth to someone's backyard. Which got me thinking of course about how I might accomplish the same task, and I have to admit, I don't think I have any idea, but I'd like to have a better sense of how this works.
So to transition back to photography from politics here, say you were asked to make a portrait of the President. How would you do it? Where would you take the photographs? Once there, what sort of scene would you put them in? Position? Lighting? Props? Etc?
Assuming of course this is a real task and that the goal is not to be arrested immediately afterwards.

Pick from any of the past Presidents - Nixon, Carter, Reagan, Bush I, Clinton, Bush II, or Obama.