Power. Their physical strength, ability to not die, the amount of influence they had, as well as acts of wizardry they may have performed. Power will be measured in Kazaams on a scale of 1-4 (with 1 being weak and 4 being mega powerful).
Virtue. I tried to be as objective about this one as I could, weighing how each man defended civil liberties and attempted to make America a "more perfect Union" against any extramarital affairs, war mongering, slave holding, and general crookedness. Virtue will be measured in Star Wars.