Brier isn’t getting younger either. Trump will get at least one more, maybe 2 if 2020 works out.
Hope he gets three: Bader-Ginsberg, Breyer, and the racist “Wise Latina” (she has bad diabetes.)
That would leave Kagan as the sole, lonely a-constitutional nutcase on the court.
I see a total of possibly 7 at the most, 4 at the least (one being Thomas). Depends on everyone’s health, and their will to be a minority on the court, holding out for the possibility of a Democrat President in 2024.