Iran wants the deal from which Trump withdrew. The Biden administration wants a new and improved deal. The likely outcome is no deal at all. From Philip Giraldi at unz.com:
Critics of the foreign and national security policies of the Joe Biden regime were quick to note that the American soldiers being pulled out of Afghanistan were no doubt a resource that will be committed to a new adventure somewhere else. There was considerable speculation that the new model army, fully vaccinated, glorious in all its gender and racial diversity and purged of extremists in the ranks, might be destined to put down potentially rebellious supremacists in unenlightened parts of the United States. But even given an increasingly totalitarian White House, that civil war type option must have seemed a bridge too far for an administration plagued by plummeting approval ratings, so the old hands in Washington apparently turned to what has always been a winner: pick a suitable foreign enemy and stick it to him.
It is of course generally known that when Joe Biden was running for president, he committed himself to making an attempt to reenter the Joint Comprehensive Plan of Action (JCPOA) of 2015 which placed limits on the Iranian nuclear program and also established an intrusive inspection routine. In turn, the Iranians were to receive relief from sanctions related to the program. In 2018 President Donald Trump withdrew the United States from the agreement based on the false argument that Iran was cheating on the arrangement and was secretly engaged in developing a weapon. Trump’s neocon supporters on the issue also argued without any evidence that Iran was intending to use the agreement as cover for its efforts to accumulate enriched uranium, guaranteeing that they would be able develop a weapon quickly when the inspection regime expires in 2025.
The Trump move was, of course, backed by the Israel Lobby and it was widely seen as deferring to Israeli interests at a time when the agreement was actually good for the United States as it blocked an unfriendly country’s possible nuclear proliferation. Unfortunately, a US government’s bowing to Israel is not exactly unusual and the withdrawal was subject to only limited criticism in the mainstream media.