What they have done is not un-constitutional, it is howerver trampling on an order and way of doing things that has been accepted by both sides for a long long time.
I just remember when the shoe was on the other foot and the Dems were holding up George W. Bush's nominees left and right and purely on ideological and political grounds, and when the GOP controlled Senate considered this same "nuclear" option, how they moaned, whined, complained and and cried out. Including to the person almost every one of these two-faced, coniving, lieing scoundrels who today are saying that this is somehow okay now that they are doing it.
Well, let it come back to haunt them for years.
What comes around goes around and everything cycles . . .
It’s just politics and they are all a bunch of crooks . . .
Well, at least Nixon denied it . . .
The moment the Dems started doing that to the Bush nominees (and the moment the GOP started talking about the "nuclear option"), today's move became inevitable. The GOP has continued the trend of increasing use of the filibuster for nominees, and there is no doubt that the Dems would have done the same the next time the GOP controlled the Presidency and Senate. It was only a matter of time before some Senate majority - GOP or Dem - put a stop to it.