“The Phoenix police is always professional and the FBI and Department of Homeland Security have been great about coordinating with local law enforcement,” former Arizona GOP Chairman Robert Graham told The Hill. Charlottesville isn’t the only reason to think the Phoenix rally could be combustible. The president has mused publicly about pardoning Joe Arpaio, the controversial former sheriff of Maricopa County, Ariz., and an early Trump supporter who was found guilty in a Justice Department investigation of racially profiling Latinos. Arpaio was found guilty of contempt of court after he continued the practices. Democrats are warning that a public pardon at a campaign rally would stoke racial tensions at a time when the nation is on edge.