Pennsylvania voters are heading into a typically low-profile election, but this year’s outcome could reshape the state’s legal landscape. On Nov. 4, three Democratic justices on the state Supreme Court—Christine Donohue, Kevin Dougherty and David Wecht—face retention votes that could influence rulings on abortion, redistricting and voting rights for years to come. Democrats currently hold a 5-2 majority, but Republicans see an opening: If even one justice is voted out, the balance cou...