So President Bush outpolled Clinton?
The simple fact that Dubya and Clinton are even on a list of the top 50 Greatest Americans just proves that our society is a "what have you done for me lately" one, and that most Americans are inherently ignorant of our nations history.
Washington, Jefferson, Hamilton, Lincoln, Madison and Reagan (in no particular order) would be in the top 10...but politicians are not necessarily the only picks for 'greatest americans'.
I find it noticeable that there are NO military (well, except for Washington) on the list...what about Eisenhower? Bradley? Patton? Nimitz? What about leaders in business? Medicine? Law?
Yes indeed : )