Within days of the U.S.-Israeli strikes on Iran that began on February 28, 2026, the Trump administration was offering different and sometimes conflicting explanations for why the United States went to war. The Washington Post reported on March 3 that the White House was giving “shifting rationales” for the attack, even as U.S. officials with access to intelligence reports said they saw no sign Iran had posed an imminent threat to the United States.
Over the opening weekend, Trump had described the operation as an effort to devastate Tehran's rulers so the Iranian people could take over, according to the Post. By Monday, March 2, Defense Secretary Pete Hegseth was saying, “This is not a so-called regime change war, but the regime sure did change, and the world is better off for it today.” Hegseth framed the threat around Iran's weapons: “Iran had a conventional gun to our head as they tried to lie their way to a nuclear bomb.”
Secretary of State Marco Rubio offered a different line. “We knew that there was going to be an Israeli action. We knew that that would precipitate an attack against American forces, and we knew that if we didn't preemptively go after them before they launched those attacks, we would suffer higher casualties,” he told reporters. He said the U.S. would like to see Iranians overthrow their government but that “the objective of this mission is the destruction of their ballistic missile capabilities and of their naval capabilities.” House Speaker Mike Johnson called the attack a “defensive operation” because Israel was ready to act “with or without American support.”
Trump, meanwhile, listed four objectives at the White House: destroying Iran's missiles, wiping out its navy, stopping it from obtaining a nuclear weapon and ensuring the regime could not keep arming groups abroad. The Post reported he never mentioned deposing the regime and instead stressed that Iran would “soon” have missiles able to reach the United States. Sen. Mark Warner, the top Democrat on the Intelligence Committee, said he had heard four or five stated reasons for the attack and that “there was no imminent threat to the United States of America by the Iranians. There was a threat to Israel.”
The shifting explanations came as Congress weighed a war powers resolution to restrain the president's ability to keep fighting without its approval. Hegseth rejected comparisons to the 2003 Iraq invasion: “This is not Iraq.”
Correction (October 14, 2026): This entry previously said the justification had “shifted five times in six weeks” and ended with “finishing the job”; the entry is dated March 3, four days into the war, and we found no source for that count or that phrase. It also listed five specific justifications, including retaliation for attacks on U.S. troops, the October 7 Hamas attack, human rights and preventing Iranian regional hegemony, which we could not source; they have been replaced with the rationales officials are documented giving. A paragraph comparing the shifts to the Iraq War justifications in 2003 and a claim that critics said the real motive could not be stated publicly have been removed as unsourced. All three original citations were dead or pointed to unrelated articles and have been replaced.