Trump today claimed "they are negotiating with Iran" and reiterated "Iran has agreed not to possess nuclear weapons," which is the same core commitment he has repeatedly emphasized since April.

In the past two months, from "negotiations deadlocked" to "progressing in an orderly manner," and then to market probability predictions rising to 74%, the U.S. rhetoric has consistently centered around Iran's "not developing nuclear weapons" bottom line, deliberately distancing itself from the JCPOA agreement during the Obama era.
Trump explicitly mentioned this time that "Iran's Supreme Leader is negotiating with the United States."
In previous unilateral statements, Iran often remained silent or did not confirm such "agreements."
Bringing the Supreme Leader directly to the negotiation forefront may aim to demonstrate domestically that he has obtained direct commitments from Iran's highest decision-making echelon, clearing internal political obstacles for the final agreement.
If true, it means the negotiations have reached the most core level.
On June 3rd, U.S. President Trump stated that they are reaching an agreement with Iran.
Iran has agreed not to possess nuclear weapons.
Iran's Supreme Leader is granting approval for the negotiations.
There may be a meeting with Iran's Supreme Leader at some point.
By Labor Day in the U.S., the blockade on Iran might be lifted.
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