I will take a stab at it: Santorum supporters tend to be conservatives who have not yet woken up. They still trust the FDA (which just approved Neotame, a form of aspartame, and it does not even have to be listed in ingredients) and think that maybe the TSA is extreme but "at least no one has managed to blow up any planes with a shoe bomb", not realizing how moronic the whole farce was. Basically if a hungry polar bear was headed for them, they would think "nice, polar bears are so friendly in those Coca-Cola commercials I see on TV" rather than "holy moly, here is 1000 lbs of carnivore headed my way - and to him, I look like lunch!"