"At this moment the rivals of this arrangement have been flooding Congressional workplaces," Obama said on a call with gatherings including the Washington-based research organization Community for American Progress.
Bunches who restricted the arrangement, for example, American Israel Open Issues Board of trustees known as AIPAC, have burned through $20 million in television advertisements to put weight on individuals from Congress, Obama said.
"They begin getting squishy on the grounds that they're feeling the political warmth," Obama said of individuals from Congress he has met with lately.
Obama did not thank the gatherings for any of their bolster in this way, yet rather influenced them to venture up their endeavors.
He attracted correlations to the lead up to the Iraq war, taking note of that gatherings who contradicted it were not vocal until it was past the point of no return.
"Without your voices, you are going to see the same exhibit of voices that got us into the Iraq war, prompting a circumstance in which we swear off a noteworthy open door and we are back on the way of potential military clash," Obama said.
In the event that maintained, the arrangement is sure to shape Obama's legacy as he gets ready to leave office. He said he has never been more sure of an approach choice.
Congress is presently looking into the arrangement that the United States and other world forces arranged with Iran to restrict its atomic abilities in return for an alleviation of authorizations.
Adversaries of the arrangement question whether it goes sufficiently far to guarantee Iran does not add to an atomic weapon.
Congress has until Sept. 17 to affirm or reject the assention. Obama has said he would veto any enactment that undermines the arrangement, however Congress could override his veto with enough votes.
Four Just delegates voiced their backing for the arrangement on Thursday, including Senate applicant Chris Van Hollen and Dan Kildee, who speaks to the locale of Amir Hekmati, who is being held in Iran.
The White House said its supporters so far have added to 70,704 messages and 63,862 calls to individuals from Congress, encouraging them to not dismiss the arrangement.
The White House did not give a rundown of the considerable number of gatherings on the call.