There could have been one a few years ago, but a judicial nomination was held up for over a year, on blatantly partisan grounds. They all know that they were appointed for partisan reasons.
There are some very partisan cases appearing in front of the court and it is worth considering whether they will act in a partisan manner. There is reason why to believe that they have, and will. It should not just be up to the minority party to call for impartiality.
The greatest majority lately was 8:1 during Bush Sr.
The last democrat supermajority was during Roosevelt/Truman, when all 9 justices were democrat-nominated.
For anyone who's interested, here's a google doc I created that shows the tenure of the justices with the party of the president that nominated them, starting from the end of Truman. It's been on my to-do list to extend it back to the first justices. Maybe I'll take that as a weekend project.
https://docs.google.com/spreadsheets/d/1TKXH_wb29XumUAEXPGCn...
Justice mixed with partisanship is incredibly dangerous to democracy.
The rest of the Justices appear to recuse themselves regularly and properly.
In the Israeli "constitution" the legal system is subordinate to the parliament. Practically, the courts have been taking more and more power to themselves, at one point even ruling that the Parliament Speaker (Edelstein) must quit. [His response was to complain about the courts brazen over-reach, but complied - thereby ceding that authority.]
There i now a push-back, as people wonder why "appointed for life" pols should have so much power.