David Graham: “Trump has been remarkably successful in his push to gerrymander ahead of the midterms. Several Republican states have redrawn their districts to add GOP-leaning seats, the Supreme Court’s April decision in Louisiana v. Callais allowed other states to move forward with their own maps, and a state court in Virginia shot down retaliatory gerrymandering that would have assisted Democrats. In all, this has given Republicans several more likely seats.”“But nearly everything else has faltered, including the president’s signature legislative initiative to overhaul elections by, in part, requiring voters to provide proof of citizenship.”