I'm also tired of this circus, don't care what happens eventually but I never for a second thought the US did it FOR Israel, this whole "we only think of you when we go to bed at night" is joke, political games.
It's all just symbolic on the part of the Legislative Branch because it's already a done deal and by the time that the LB could 'stop it' the mechanisms for giving Iran EVERYTHING it demanded of Obama and Kerry would already be done and probably could not be halted again -- or at least could not be halted in a meaningful way since the other nations that are signatories would not cooperate with putting the lid back on Iran.
So this posturing by the Legislative Branch is all sound and fury signifying . . . nothing. Effectively after Bush and now Obama the Legislative Branch essentially exists so that the president CAN point a trembling finger of blame somewhere AFTER he has screwed up big time. Sigh . . . and so it goes.