A race for mayor of Atlanta headed for a recount on Wednesday after a knife-edge election that exposed a racial fault line running through the biggest city in the U.S. Southeast. Former state Senator Kasim Reed declared victory overnight when official results from the runoff vote showed him beating city councilwoman Mary Norwood by 758 votes out of 83,000 cast. But Norwood declined to concede defeat and is almost certain to demand a recount under rules that permit one when less than 1 percent of votes cast separates the candidates. Norwood, who led an initial round of voting November 3,...