That’s nice that you think that your interpretation of conservatism is the only measure of a conservative, but reality is otherwise. Fred Thompson is certainly a conservative, but he is not the only top tier conservative in the race by any measure.
I've just been following the Reagan model for conservatism covering the 33 years. First hand mind you. That is all I know and its served me pretty darn well. If you were paying attention, you would know what constitutes a real, true blue conservative too. It isn't Huckabee or McCain and its definitely not Giuliani or Romney.
Wake up! Fred is the only conservative in the top five.