The Maricopa County Recorder and the Maricopa County Elections Director are advocating that the legislature eliminate the Arizona presidential primary in 2012. See this story. Maricopa County includes Phoenix; 60% of Arizona’s population lives in Maricopa County. Thanks to Mike Feinstein for the link.
It is too late for any Arizona legislator to introduce a bill this year, but an existing election law bill could always be amended to implement the idea of eliminating the 2012 presidential primary.