Alot of conservatives slammed on Grassley for letting things carry on and not shutting down the Left, but I guess I have a different take.
Watching from the beginning, the Dems tried to bum rush Grassley with a full court press, typically thinking as cocky young leftists do that he was a slow old man that would capitulate.
Grassley however was ready for them, shot down their arguments effectively, slowly ground them down back to order, and the hearings proceeded. He let them have their free speech but did not let them be effective.
It was a good strategy because they responded with increasingly desperate methods. From there it was Dem grandstanding and clown show antics. They looked amateur, childish, tinfoil, and cheesey like some college SJW kangaroo court.
Kavanaugh clinched it. The man has an amazing grasp and memory of the law, cases, judicial history, and American political history. The Dems simply couldn't do their gotcha stuff, because Kavanaugh knew the material too well.
And the result is the Left is frustrated and boiling, which is exactly where we want them, because that's when they lose their head and politically do stupid things.