Obama and Biden should have done more. But they are not responsible for the malicious and calculated mess that has followed.

RBG passed away while Trump was president. Obama did pick a replacement for Antonin Scalia though: Merrick Garland. Republican Majority Leader Mitch McConnell refused to even give Garland a hearing arguing it was "too close to the presidential election", even though Obama's term had about one year to go.

I wasn’t aware of that - thank you.

Clarence Thomas was confirmed in a very different era of politics, when the long term right wing strategy was only just beginning to take root; the vituperative rhetoric was still on the comparative fringe of talk radio; and cooperation was still the norm from both sides.