ATLANTA — A federal judge ruled Thursday that Democratic gubernatorial candidate Stacey Abrams can’t use a state law created to give Gov. Brian Kemp a major fundraising advantage in their possible rematch this year. Judge Mark Cohen telegraphed his written decision during a Monday hearing in the case when he said Abrams won’t be the Democratic nominee for governor until her uncontested May 24 primary. Being the party’s nominee is a requirement for using the leadership committee law approved last year by the Republican-controlled General Assembly. “Granting plaintiffs’ requested relief ... woul...