PHOENIX (AP) — Wisconsin Governor Scott Walker will be the headline speaker at a luncheon hosted by the Arizona Chamber of Commerce. Walker is scheduled to give remarks at the Wednesday event in downtown Phoenix. Organizers say the luncheon is part of a leadership series that features political leaders who are considering running for president of the United States. Walker is a conservative favorite thanks to his anti-union approach. The prospective 2016 Republican presidential candidate has been appearing at GOP events, billing himself as a leader with the experience to put the nation on the right path. He successfully gained victory in a 2012 recall election. Arizona Governor Doug Ducey will also be in attendance.