I think you have a very simplistic method of looking at big, complex picture. I can assure you that many amongst the 'lower half of the table' as you put it, also voted for Kerry. Though it may seem so upon an initial glance, I doubt that the election results are broken down entirely upon lines of intellectual capacity/education level of the voters. There are many, many more relevant issues that had greater impact upon the population than your (naive) premise that the dumb voted Bush and the semi-smart voted Kerry. These include issues dealing with religion, "family values" , xenaphobia, perceptions of security as well as economic and social programs. It's obvious to me that the lines were split pretty evenly... and this over several areas.