Liann
Cathlete
I could be wrong but I think two justices, Stevens and Ginsburg have indicated that they will retire soon. So there may be two empty slots during the next administration. As I said, I could be wrong though, I am woefully not up to date on the supreme court these days!!
Sparrow
That is a HUGE issue for both sides. It is very likely that the next President could end up having to nominate someone to the Supreme Court. This is crucial to both parties.