MN Superdelegates endorsing Clinton

@MinnesotaDFL @SenFranken @amyklobuchar @GovMarkDayton @kenmartin73 @MargeHoffa @lorisell @javimorillo @R_T_Rybak @BettyMcCollum04 @RickNolanMN @RepTimWalz @tomemmer @collinpeterson @RickMNStafford