In the months before a midterm election that will determine the balance of congressional power, the Trump administration has carried its effort to restrict mail-in voting to the Supreme Court, asking the justices to revive an executive order that lower courts found exceeded presidential authority. The order, which would have federal agencies compile voter lists and limit postal delivery of ballots to those on them, sits at the intersection of two enduring American tensions: the reach of executive power and the constitutional sovereignty of states over their own elections. What the Court decide