Attorney General Kris Mayes is challenging several recent Arizona Corporation Commission decisions, sparking frustration from a body often considered Arizona’s fourth branch of government.

In the month of March alone, Mayes’ office filed three rehearing requests in three separate commission matters, accusing commissioners of violating state law, ignoring the commission’s own rules or acting contrary to the best interests of utility customers. Mayes’ office has also filed a lawsuit over the commission’s approval of a controversial data center contract and is intervening in two rate cases involving Arizona Public Service and Tucson Electric Power.