In a letter sent to Maricopa County officials and shared with NBC News, Hobbs, a Democrat, cited security concerns about losing the chain of custody over the equipment when it was handed over to the auditors and urged the county to get new machines. If it does not, her office would consider decertifying the equipment involved in the audit, she wrote. That would remove the machines from service... "I have grave concerns regarding the security and integrity of these machines, given that the chain of custody, a critical security tenet, has been compromised and election officials do not know what was done to the machines while under Cyber Ninjas' control," Hobbs wrote in the letter to the county's mostly Republican Board of Supervisors, which oversees the county elections. In Arizona, the secretary of state can decertify machinery in consultation with the state's Election Equipment Certification Committee, a three-person panel appointed by Hobbs.