Did you catch the latest hit piece from the McCain camp? It seems that some "Arizonians" voted against Hayworth in 2006. Well, the "ians" ending is pretty common--just ask some "Californians" or "Floridians." But spelling "Arizonan" with an "i" is about as bad as pronouncing "rodeo" the same way as the Beverly Hills folks do when they talk about "Rodeo Drive."
I guess that adding an "i" to the ending of Arizonan is an easy mistake to make...if you don't live here.