Remember that in US elections, even important ones, the # of people who vote is far lower than you find in say France.  US turnout generally resembles what you find for EU-related votes.  

Add in the, uh, flaws in our voting system (there is an entire wing of the internet devoted to this by now, find it yourself) and you realize that you can't determine much of anything by the fact that Bush is President other than that Americans by and large have no sense of Civic responsiblity or connection to Government.