ATLANTA—Former Georgia Republican U.S. senator Johnny Isakson died on Sunday. He was 76. Isakson died in his sleep before dawn at his home in Atlanta, his son John Isakson told The Associated Press. He said that although his father had Parkinson’s disease, the cause of death was not immediately apparent. “He was a great man…

ATLANTA—Former Georgia Republican senator Johnny Isakson died on Sunday. He was 76. Isakson died in his sleep before dawn at his home in Atlanta, his son John Isakson told The Associated Press. He said that although his father had Parkinson’s disease, the cause of death was not immediately apparent. “He was a great man and…