The City of Miami unconstitutionally gerrymandered voting districts by race and ethnicity, a federal judge found on Wednesday, throwing out the city’s voting map and rejecting the way city commissioners have tried to hold on to power for more than two decades.

Judge K. Michael Moore of the Federal District Court in Miami wrote that commissioners had used redistricting rationale since 1997 to draw five districts with the explicit intent of having voters elect three Hispanic commissioners, one Black commissioner and one non-Hispanic white commissioner.