( NewsNation) — A ranking member of the House Armed Services Committee says lawmakers were provided zero evidence that Iran’s nuclear program posed an imminent threat to the U.S. before the Trump administration launched an attack on the country.

Just days before the U.S. strikes on Iran, Tehran was hinting a nuclear deal with Washington was a possibility.

President Donald Trump said that Iran's nuclear program was "obliterated" last summer, but he now says the U.S. may have to bomb Iran again over Iran's nuclear ambitions.

President Trump said he believed Iran was going to attack first as the White House continued to defend its reasoning for launching major combat operations against Iran.

In discussing his reasoning for launching U.S. airstrikes on Iran, President Donald Trump said, "An Iranian regime armed with long-range missiles and nuclear weapons would be a dire threat to every American.

Iran's nuclear program, enrichment of uranium and its ballistic-missle development program have been at the crux of the negotiations.

For decades, Iran’s nuclear ambitions have been at the center of tensions with the US and its allies, raising concerns that Tehran could eventually build atomic weapons. Israel has long considered a nuclear-armed Iran as an existential threat.

President Trump on Monday said Iran’s growth of its ballistic missile program, plus its resumption of trying to build a nuclear weapon, warranted the U.S. and Israeli attacks that began Saturday and