It’s important to remember just how radical — and, yes, unprecedented — the Senate’s approach to the previous Supreme Court nominee was.

Republican leaders announced last March that they would not consider any nominee. They did so even though Barack Obama still had 10 months left in his term and even though other justices (including Anthony Kennedy) had been confirmed in a president’s final year.

The refusal was a raw power grab. Coupled with Republican hints that no Hillary Clinton nominee would be confirmed either, it was a fundamental changing of the rules: Only a party that controlled both the White House and the Senate would now be able to assume it could fill a Supreme Court vacancy.

The change is terribly damaging for the country’s political system. It impedes the smooth functioning of the court and makes it a much more partisan institution.