Very simple, check out the past election results.
As I've said, he's gotten almost the same number of votes each time he's run, quite a coincidence, and his nearest opponet gets about half. Approximately 10-12% of the membership takes the time to vote in an election, the rest, IMO just don't care-they pay their $58 so they can fly at their field and want nothing more to with the AMA. As for the people who like Dave and the way he's running the AMA, I would think that they would vote to ensure his staying in office, but I guess most don't. Of course you could look at it another way and say that 15,000 modelers like the direction Dave is taking the AMA and the rest don't care.
It's a well known fact that, at least to me and many other modelers who try to keep up with the workings on the AMA, FF and C/L guys think Dave is looking out for their interests versus R/C. Both groups may be small in number but they're very dedicated to their aspect of the hobby and vote in larger percentages than the R/C guys.
Jon