Two years ago Republicans threatened to use the 'nuclear option' if the Democrats filibustered. That was the Dems chance to get rid of the filibuster.
What were they thinking when they didn't take that chance? Were they nostalgic for the Civil Rights filibusters of the 60-s? Did they think the Dems would never again be the majority in the Congress? Were all the great challenges of our democracy over, never again to require decisive and timely action in making major changes?
Whatever it was, it was stupid, craven, and wrong. And we're eventually going to pay the price.