It's actually one of the most successful strategies in game theory. Definitely not childish.
Look, Mitch warned the House about this issue and they went ahead with things. Mitch is letting the House GOP know who is in charge. I don't mind that.
Maybe in turn, the GOP legislators were hoping that putting the other items under the gun would heighten the public outrage at the boltibuster. After all they’re supposed to be there to represent the Indianan public.