ATLANTA — It’s Friday evening, two weeks before the Georgia Senate runoff. Uzoma Nkwonta is several thousand feet in the air aboard an American Airlines flight heading back to D.C. — still in the navy suit and Calvin Klein loafers he wore to court that day — when he opens his laptop to discover his client had won his lawsuit against the state of Georgia. Court cases typically move at a glacial pace, but this one lurched forward at a furious speed: Nkwonta filed the lawsuit...