Iran's Supreme Leader says U.S. breaches show Trump's signature is 'worthless'

Iran's Supreme Leader Mojtaba Khamenei has declared that U.S. President Donald Trump's signature on international agreements is worthless following repeated breaches of a memorandum of understanding. The statement comes as hostilities between Washington and Tehran escalate, following the collapse of a recent ceasefire agreement.
Why it matters
The breakdown of diplomatic agreements and the resumption of direct strikes between the U.S. and Iran significantly increase the risk of a large-scale regional conflict in the Middle East.
Iran’s Supreme Leader Mojtaba Khamenei said in a written statement on Saturday (July 18, 2026) that repeated U.S. breaches of a memorandum of understanding signed by the Presidents of Iran and the United States had shown that President Donald Trump’s signature was “utterly worthless and devoid of credibility.”
Washington and Tehran have exchanged strikes after a ceasefire agreement fell apart last week, raising fears of a return to all-out war.
Khamenei said the United States should know that the Iranian nation and the “resistance front” had “unforgettable lessons” for it.
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