For years, Nora Castaneda watched her Mormon community grow and grow as it drew converts from a burgeoning Hispanic population in Mesa, Arizona. Then, in 2010, it all went into slow motion. It turned out the author of Arizona's tough illegal immigration law, then State Senator Russell Pearce, was a Mormon. As word got around, the dark-suited missionaries who'd been having great success in this Phoenix suburb were suddenly having doors slammed in their faces.