If you read the full statement, what Tulsi Gabbard warned about in March is actually the same as what the IAEA said in May and what the Trump administration and Israeli government said in June -- that Iran has been enriching uranium at levels too high for innocent domestic use.

Specifically, Gabbard said in March that Iran's "enriched uranium stockpile is at its highest levels and is unprecedented for a state without nuclear weapons."

Although the intelligence services have no evidence of Iran literally putting this uranium into a bomb, and as far as they can tell, Khomeini hasn't officially restarted the nuclear bomb program he suspended in 2003 ... Iran is not enriching uranium for any good reason.

That's what Gabbard said in March, and that's what the IAEA and administration are saying now.

The IAEA estimated that with uranium already enriched at the levels they verified, it would take Iran mere weeks to make a bomb, should they decide to do so. This is what prompted the response from Israel and the U.S., whether you think that response is warranted or not (which is of course arguable).

In case you DO want to read Gabbard's full statement from March 26, 2025:

"Iran continues to seek to expand its influence in the Middle East, despite the degradation to its proxies and defenses during the Gaza conflict. Iran has developed and maintains ballistic missiles, cruise missiles, and UAVs, including systems capable of striking U.S. targets and allies in the region. They’ve shown a willingness to use these weapons, including during a 2020 attack on US forces in Iraq and in attacks against Israel in April and October 2024. Iran’s cyber operations and capabilities also present a serious threat to U.S. networks and data. The IC continues to assess that Iran is not building a nuclear weapon and Supreme leader Khomeini has not authorized the nuclear weapons program that he suspended in 2003. We continue to monitor closely if Tehran decides to reauthorize its nuclear weapons program. In the past year, we’ve seen an erosion of a decades long taboo in Iran on discussing nuclear weapons in public likely emboldening nuclear weapons advocates within Iran’s decision-making apparatus. Iran’s enriched uranium stockpile is at its highest levels and is unprecedented for a state without nuclear weapons. Iran will likely continue efforts to counter Israel and press for U.S. military withdrawal from the region by aiding, arming, and helping to reconstitute its loose consortium of like-minded terrorists, actors, which it refers to as its “Axis of Resistance.” Although weakened, this collection of actors still presents a wide range of threats including to Israel’s population, U.S. forces deployed in Iraq and Syria, as well as U.S. and international military and commercial shipping and transit."