on tuesday, a federal district court made history by striking down north carolina’s congressional map. the decision marks the first time a court has invalidated a congressional redistricting scheme as illegally gerrymandering along partisan lines. it arrives at a critical moment for the development of a legal theory that requires federal courts to set limits on political redistricting. tuesday’s rigorous ruling bolsters the constitutional case against partisan gerrymandering, which the supreme court may well affirm this year. it relies heavily on the writing of justice ruth bader ginsburg, who aided opponents of gerrymandering in a crucial but often overlooked 2015 opinion. there’s no question that north carolina republicans manipulated their state’s congressional map to disfavor democratic voters. the gop legislator who helped to draw the current map, state rep. david lewis, openly declared that the scheme constituted “a political gerrymander,” explaining: “i think electing republicans is better than electing democrats. so i drew this map to help foster what i think is better for the country.” lewis also admitted that he used “political data in drawing this map” for the sole purpose of “gain[ing] partisan advantage,” his ultimate “goal.” he succeeded, giving republicans an advantage in 10 out of the state’s 13 congressional districts—while noting that he would’ve preferred “to draw a map with 11 republicans and two democrats.” voti...