President Hassan Rouhani has claimed that the remaining signatories of the 2015 nuclear deal, "had discussions within the framework of the P4+1, and preparations for a P5+1 meeting were made, which had been agreed upon by all parties,” which would mean the United States was also involved in the agreement.
In remarks before leaving Tehran heading to Armenia on Monday, Rouhani described the P4+1 discussions in New York on September 25 as "a significant step and decisive action but stopped short of elaborating on it.
After President Donald Trump’s decision to withdraw from the Joint Comprehensive Plan of Action (JCPOA) in May 2018, only four of the permanent members of the UN Security Council remained part of the agreement.
Nonetheless, Trump, for his part, has also explicitly affirmed that he would never agree to cancel the sanction as a precondition for a new round of nuclear talks between Tehran and Washington.