Democrats should make clear that if the GOP destroys this tradition, they will expand the Court to 15 in 2021 without filibuster.
But it’s not just a retirement that threatens the legitimacy of the Court.
1. Double jeopardy and dual sovereignty (Trump’s potential abuse of pardons).
2. Subpoena for Trump to be interviewed
3. The constitutionality of Mueller’s office or maybe his removal.
My point is, unlike McConnell’s big lie, there is a real tradition of presidents not appointing during legitimacy crises.
And we are in the middle of a big one.
Iran-Contra and the start of Whitewater don’t count. Clinton’s perjury and Trump’s obstruction do.