Waukegan Mayor Sam Cunningham (left) celebrates Mother’s Day in May with his mother, Mary Ross-Cunningham (right). She died at the age of 80 following a serious illness. | Photo via Waukegan Mayor Sam Cunningham Lake County Board Vice Chair Mary Ross-Cunningham was remembered as a “trailblazing leader” during funeral services on Thursday and Friday. Cunningham, who was 80 years old, died on June 23 of natural causes at Endeavor Health Highland P…