Rhode Island Democrats are expected to endorse Representative Patrick Kennedy for re-election when they meet tonight in West Warwick. Party members will endorse candidates for Congress and the state's top jobs -- governor, secretary of state, general treasurer and attorney general. Kennedy has checked himself into the Mayo Clinic for treatment for addiction to prescription drugs following a Thursday car accident in Washington. He says he can't remember driving to Capitol Hill or crashing his car. Kennedy's doctors say he was taking Phenergan for stomach and intestinal problems and Ambien, a commonly prescribed sleeping medication. Police say he appeared intoxicated.