OLYMPIA, Wash. (AP) - Rob McKenna and Jay Inslee have been on this collision course for years. McKenna, a Republican, has been methodically moving up the political ranks - from student body president at the University of Washington, to county councilman, to attorney general and now to Washington's race for governor. Inslee, a former congressman, first ran for the state's top office in 1996 and has been laying the groundwork in recent years to be Gov. Chris Gregoire's successor. The two candidates headline a packed ballot for the state's Aug. 7 primary, which will weed out candidates in several statewide races - from the U.S. Senate to attorney general to auditor to the Supreme Court. Secretary of State Sam Reed expects the major open seats to help drive more turnout than usual.