MADISON, Wis. (AP) – The head of Wisconsin’s largest police union says he’s mulling a run for attorney general.  Jim Palmer is the executive director of the Wisconsin Professional Police Association. He said Thursday he’s seriously considering a run as an independent and plans to make a formal announcement in the next two months.  He says he would advocate for local police, work to raise awareness of the shortage of local prosecutors and support open government.  Waukesha County District Attorney Brad Schimel, a Republican, announced Wednesday he has formed a campaign committee to run for attorney general. State Reps. Jon Richards and Chris Taylor, both Democrats, also are considering running.  Incumbent Attorney General J.B. Van Hollen, a Republican, announced this week he won’t seek re-election next year.