Above: Rev. Raphael Warnock returns to his Savannah roots in new television ad Warnock looks to break from pack with ad campaign By Jonathan Grant @Brambleman Progressives worrying about Georgia Senate candidate Raphael Warnock’s absence from the airwaves can relax. His first ad, “Grew Up,” went up today, and like his original announcement video, it highlights his humble beginnings in Savannah’s Kayton Homes and rise to prominence in the pulpit of Atlanta’s famed Ebenezer Baptist Church, where Dr. Marin Luther King Jr. and his father both served as pastors. Among Democrats in the crowded field to fill out the remainder of Johnny Isakson’s term, Warnock has a big fundraising advantages and has received endorsements from prominent Dems, including former gubernatorial candidate Stacey…