"You cannot celebrate Dr. King on Monday, and undermine people's ability to vote on Super Tuesday," said the Rev. Raphael Warnock, pastor of Ebenezer Baptist Church, where King preached during the 1960s.
It was a reference to March 6, when 11 states hold primaries or caucuses for the Republican presidential nomination. Voter ID laws require voters to present some form of official identification.
During remarks at the annual commemorative King service at the downtown church here, Warnock's attacks on such laws drew a standing ovation from nearly everyone except Gov. Nathan Deal and Sen. Johnny Isakson, both Republicans, who were on the dais with him.