...so rural voters are more conservative than urban voters..?
I believe that rural folks are on average greater in character and common sense than their urban counterparts.. yes people of character and common sense live in urban areas, but they are a much smaller percentage of that population.
“I think our governments will remain virtuous for many centuries as long as they are chiefly agricultural; and this will be as long as there shall be vacant lands in any part of America. When they get plied upon one another in large cities, as in Europe, they will become corrupt as in Europe.” - Thomas Jefferson