(Portland, OR)  --  The union representing Portland police officers says it's reached a tentative agreement with the city.  The Portland Police Association says it hopes the deal will alleviate staffing shortages by bringing well-trained and experienced officers to the Police Bureau.  Under the contract, police officers would receive a raise, but a rule that allows officers up to 48 hours before being interviewed about use-of-force complaints would be eliminated.  Union members will vote on whether to ratify the contract.