The claim that the Trump administration misrepresented intelligence to justify attacking Iran is mostly true because multiple independent sources report that key assertions made by President Trump, such as imminent Iranian missile threats, were not supported by U.S. Intelligence assessments and that some claims were false or unproven.
The Trump administration “misrepresented intelligence” in making its case for attacking Iran

Trump’s claim Iranian missiles could soon strike US ‘unsupported by US intelligence’ - The Independent
Source: independent.co.uk
Key Evidence
Multiple independent sources confirm Trump's missile threat claims were not backed by U.S. Intelligence.
independent.co.ukindependent.co.ukTrump’s claim Iranian missiles could soon strike US ‘unsupported by US...
timesofisrael.comtimesofisrael.comTrump's claim on Iranian missile development said unsupported by US intelligence
The New York Times fact-check found key claims in Trump's case for attack to be false or unproven.
nytimes.comnytimes.comFact-check: In Trump’s Case for an Attack on Iran, False or Unproven Claims
Expert analysis calls out lack of clear justification based on credible intelligence.
justsecurity.orgjustsecurity.orgThe Need for a Congressional Rebuttal on Trump's Iran Attack
What the Evidence Shows
Several reputable news organizations and expert analyses indicate that the Trump administration's public rationale for attacking Iran included claims about Iranian missile capabilities and nuclear threats that were not corroborated by U.S. Intelligence agencies. For example, The Independent and The Times of Israel both report that Trump's statements about Iran soon possessing missiles capable of striking the U.S. Were unsupported by intelligence sources.independent.co.ukindependent.co.ukTrump’s claim Iranian missiles could soon strike US ‘unsupported by US...
timesofisrael.comtimesofisrael.comTrump's claim on Iranian missile development said unsupported by US intelligence
The New York Times fact-check further highlights that multiple claims used to justify the attack were either false or unproven according to American and European officials and weapons monitoring groups.nytimes.comnytimes.comFact-check: In Trump’s Case for an Attack on Iran, False or Unproven Claims Additionally, Just Security critiques the administration for failing to clearly identify vital national interests or credible intelligence justifying the strike.
justsecurity.orgjustsecurity.orgThe Need for a Congressional Rebuttal on Trump's Iran Attack Iranian officials accused the U.S. Of spreading misinformation, which aligns with these findings.+1 more
However, some sources focus more on the legality and political context rather than direct intelligence misrepresentation.dailymail.co.ukdailymail.co.ukFury from Congress at Trump's 'illegal' attack on Iran after no foreign wars...
theguardian.comtheguardian.comTrump’s unprovoked attack on Iran has no mandate – or legal basis Overall, the evidence strongly suggests that intelligence was selectively presented or exaggerated to support the case for military action against Iran.