BonnieArbittier_sb4_round_table_unam_campus_amxpac_8-15-2017-3 Bexar County Commissioner Tommy Calvert (Pct. 4) listens at the Texas SB 4 discussion at UNAM Campus San Antonio. Credit: Bonnie Arbittier / San Antonio Report Commissioner Tommy Calvert (Pct. 4) listens at the Texas SB4 Round Table discussion at UNAM Campus San Antonio.