Some problems with that Robin.  First, a lot of polling places are churches.  That "union" is rep'd by a totally different process.  Second, 80% of the voters didn't bother to even show up to vote, thereby showing little concern for the results.  Third, to put a much spin as possible to your theory - polling counts at each precinct average ~ 322 votes.  If all were in schools (they are not) and the 20% number held up that would be 6 out of 322 or 1.8%.  So where's the out sized influence?