The video message from Arizona Secretary of State Adrian Fontes warmly greeted the scores of election workers who had gathered at a Phoenix-area hotel in December for a first-of-its-kind drill: “We are very excited that all of you are here,” Fontes, a Democrat, began. “You are on the front lines, and this exercise is a prime opportunity for you to hone your skills by experiencing new challenges as a team.” He wished them luck.