(Portland, OR)  --  A Portland police union is asking Mayor Ted Wheeler to keep Mike Marshman on board as police chief.  The Portland Police Association says a survey of its members shows 94 percent back Marshman and want the mayor to discontinue the national search for Marshman's potential replacement.  Union president Daryl Turner says Marshman is more than qualified for the position and has the overwhelming support of his rank-and-file employees.  In response, Wheeler says he intends to see the search through after making it a primary commitment during his campaign, but he wants Marshman to participate as a candidate.