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The Guardian - US
The Guardian - US
World
Andrew Roth in Washington

Trump advisers scramble to justify possible US military intervention in Iran

a cityscape is visible behind a woman
A research reactor in Tehran, Iran, on 26 February 2026, the final day of Iran-US talks held in Geneva, Switzerland. Photograph: Morteza Nikoubazl/NurPhoto/Shutterstock

Donald Trump’s likely casus belli for an attack on Iran – which would be the largest US intervention since the Iraq war – is fraught with contradictions, and his top advisers have been left to cover for him as the White House makes the case for intervention.

In his State of the Union address this week, Trump alleged that Iran posed a direct threat to the US and that the country was “working to build missiles that will soon reach the United States of America”. But that claim has not been backed up with evidence by the White House or the Pentagon, and US intelligence reports from just last year say that it would take Iran 10 years to develop an intercontinental ballistic missile that could reach the US.

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