Commissioners blazed through most of Wednesday’s business, giving the go-ahead for video gambling in unincorporated Cook County without discussion, and introducing a measure to assess whether Sheriff Tom Dart could handle background checks for teachers in Cook County. Neither Board President Toni Preckwinkle nor Finance Chair John Daley were present – Preckwinkle was mourning the death of a member of her political organization, president pro tem Deb Sims said, and Daley was hospitalized.