Marco Rubio told Fox News on Monday 4 May that "under no circumstances will US accept paying Iran a toll to transit Hormuz", then on Tuesday 5 May declared Operation Epic Fury concluded and shifted to a memorandum of understanding (MOU) framing for future negotiations 1. The one-page MOU that reached Tehran on 7 May proposes the exact structure Rubio rejected on television: Hormuz-first, with the nuclear file deferred. Pakistan delivered the document three days after the Fox News interview.
Andreas Krieg, a King's College London analyst quoted by Al Jazeera, called the sequencing "a concession to Tehran", framing Washington's acceptance of phased Hormuz reopening as recognition that simultaneous resolution of war, strait and nuclear was not feasible 2. Krieg's observation describes the negotiating asymmetry directly. Abbas Araghchi's 14-point text on 1 May had asked for precisely this sequencing; Trump's verbal Truth Social rejection followed within hours ; the document now in Tehran adopts it.
Rubio's 4 May statement set the United States's published red line at refusing the toll. His 5 May declaration that EPIC FURY was over closed the kinetic chapter. The MOU's delivery on 7 May then walked the published red line back, in writing, without a public reversal. The Pakistani channel performs the deniability: Trump retains room to walk back from the paper if Tehran's reply does not produce terms Washington can sell at home, while Rubio's televised position remains on the record for that purpose.
The asymmetry between Iran's 14-point comprehensive negotiating text and the US one-page document is itself informative. Iran's text was a position with sequencing demands; the US paper is operationally a term sheet. Washington has pre-positioned a document Beijing can endorse without Tehran having to ratify the terms first, with the 14-15 May Trump-Xi summit as the audience. The Krieg framing is the sharpest external read of the substance: a US administration whose Secretary of State publicly rejected the toll on Monday delivered a paper accepting the surrounding sequencing on Thursday.
