Iran's Supreme Leader Mojtaba Khamenei said Saturday that President Donald Trump's signature on the U.S.–Iran memorandum of understanding is worthless and invalid [1].
The statement marks a severe escalation in rhetoric as the two nations face a direct military confrontation. By declaring the agreement void, Tehran removes a diplomatic buffer, increasing the risk of wider conflict in the region.
Khamenei issued the warning in a written statement released from Tehran on July 18 [1]. He said President Donald Trump's signature is "utterly worthless and devoid of credibility" [2]. The Supreme Leader said this stance was due to repeated U.S. breaches of the memorandum, which he said demonstrated a lack of credibility from the American side [1].
The diplomatic breakdown follows a series of military escalations. The U.S. has conducted strikes targeting Iranian military sites for seven straight nights [3].
Khamenei responded to these military actions with a direct threat toward the U.S. government. "If the United States continues its attacks, we will teach it unforgettable lessons," Khamenei said [3].
This latest statement suggests that Iran no longer views the memorandum of understanding as a viable framework for preventing conflict. The rhetoric indicates that Tehran may be preparing for a more aggressive posture in response to the ongoing aerial campaign. The shift from diplomatic grievance to military threat underscores the volatility of the current security environment in the Gulf.
“President Donald Trump's signature is "utterly worthless and devoid of credibility."”
The formal rejection of the memorandum of understanding by the Supreme Leader signals a collapse of the existing diplomatic architecture between Washington and Tehran. With the U.S. conducting a week-long bombing campaign and Iran threatening 'unforgettable lessons,' the situation has moved beyond a war of words into a high-risk military standoff where the lack of a recognized agreement reduces the available channels for de-escalation.
