Last year, climate-hawk billionaire Tom Steyer forked out more than $23 million to support an Arizona ballot initiative that would have required the state’s utilities to get half their power from renewable sources by 2035. Arizonans for Affordable Energy, a front-group for the state’s largest utility, Arizona Public Service, spent nearly $38 million in opposition. The initiative — which failed — was the most expensive ballot measure campaign in the state’s history.