How about a majority Democrat-appointed SCOTUS overturning gerrymandering in 2018-2020?
I doubt Scalia or Kennedy will retire before 2020.
Wikipedia says they're both 78 currently while Ginsburg is 81 and Breyer is 76. Is there cumulative data on the ages when Justices step down? Those four look like prime retirement candidates in the next six years.
Ginsburg (and possibly Breyer) will likely retire before 2020 if Clinton is elected. But unless their health takes a turn for the worse, I would think Kennedy and Scalia would want to hold on until at least 2020 to see if a Republican is elected.
Why would Kennedy care about who replaces him? He doesn't seem to be an ideologue. Even if he does, would a Republican pick necessarily be closer to Kennedy's positions than a moderate compromise candidate chosen by Hillary Clinton.