(Portland, OR)  --  The Portland Police Bureau's Rapid Response Team is dead in the water following mass resignations.  The Police Bureau says every member of the crowd control unit resigned Wednesday after a grand jury indicted Officer Corey Budworth on a misdemeanor assault charge for what prosecutors say was an "excessive and unlawful" use of force during a protest last August.  Budworth is accused of hitting a woman in the head with a baton.  The Rapid Response Team is staffed by officers who volunteer for the position, and the officers who resigned will remain on duty in their regular jobs.  Meanwhile, Mayor Ted Wheeler says he has directed the Police Bureau to prepare mobile field forces to respond to any public safety needs, including potential violence related to mass gatherings.  He's also asked the Governor and Oregon State Police to make members of their Mobile Response Team to be on standby if they're needed in Portland.