Billionaire Democratic mega-donor Tom Steyer criticized the state’s largest electric company and the biggest competitor of his clean energy ballot initiative Friday for using shady tactics to block a public vote of the renewable energy measure in November.

The state’s largest utility is staying out of the Republican primary race for two open Arizona Corporation Commission seats, risking a shakeup that could have serious ramifications for the company.

The Corporation Commission may soon take another look at retail electric competition, just five years after its last foray into the issue ended with a whimper.

The government’s decision to drop a bribery case involving a former regulator and utility owner leaves the question of what will come of its parent investigation.

Arizonans can't be blocked from voting on a renewable energy proposal solely because organizers may have violated some state election laws, a judge ruled Tuesday.

The question of whether voters get to decide on a new renewable energy mandate for utilities could turn, in part, on how many petition signatures a judge lets Arizona Public Service challenge.

Pushing ahead where utility regulators so far will not, advocates of more renewable energy filed more than 480,000 signatures Thursday to put the question on the November ballot.

Arizona’s most significant public corruption case since the 1988 impeachment of Gov. Evan Mecham has come down to this: Four defendants. Fourteen days of testimony. Nearly four dozen witnesses.

With a renewable energy initiative ready to be filed next week, a state utility regulator is filing his own proposal, one that electric companies are likely to find more attractive.

The Palo Verde Nuclear Generating Station is the nation’s largest power producer, and if the Clean Energy for a Healthy Arizona initiative appears on the ballot in November, voters will decide the plant’s future.