Having burned through $28 million in a pair of losing political battles in Arizona last year, California billionaire Tom Steyer is now prepared to pump some more cash into the state.

Republican senators voted Wednesday to impose new requirements on initiative circulators in a way one Democrat said is designed to make it easier for special interests to quash future ballot measures.

State utility regulators are making another bid to find out how much money the state's largest electric utility is spending on political campaigns and lobbying.

Arizona Public Service this morning announced a major investment in solar battery, a historic shift in the utility’s approach to renewable energy.

Gov. Doug Ducey has tapped a state parks director from Colorado to serve as the new director of Arizona State Parks and Trails.

Records obtained Wednesday by Capitol Media Services show Jim Click at the top of the donor list at $25,000. That made him $10,000 more generous to finance the ceremony to swear in Gov. Doug Ducey and five other state officials.

Two utility regulators are questioning whether some customers of Arizona Public Services are paying too much and the company is earning more than it is legally entitled.

State utility regulators have no legal right to investigate their colleagues to determine if they are biased, a judge has ruled.

The Arizona Corporation Commission has restarted talks of electric retail competition five years after a similar effort fell flat.

A $31 million campaign by the state's electric utilities proved enough to keep voters from adopting a constitutional mandate that they generate at least half of their power from renewable sources by 2030.