The judge found that the Georgia legislature had complied with orders to allow Black voters an equal opportunity to elect representatives of their choice.
Moving the case to federal court would have given Mark Meadows, a former White House chief of staff, one key advantage: a jury pool that was more favorable to Donald J. Trump.
Several of Mr. Trump’s co-defendants in the state racketeering case over election interference are seeking to have the matter transferred to federal court or dismissed entirely.