WASHINGTON — Senators emerged from a classified briefing Thursday with sharply diverging assessments of President Donald Trump’s bombing of three Iranian nuclear sites, with Republicans calling the mission a clear success and Democrats expressing deep skepticism.

CIA Director John Ratcliffe, Secretary of State Marco Rubio, Defense Secretary Pete Hegseth and Gen. Dan Caine, chairman of the Joint Chiefs of Staff, came to Capitol Hill to give the classified briefings, originally scheduled for Tuesday.

Many Republicans left satisfied, though their assessments of how much Iran’s nuclear program was set back by the bombing varied. Sen. Tom Cotton said a “major blow” and “catastrophic damage” had been dealt to Iran’s facilities.

“Their operational capability was obliterated. There is nobody working there tonight. It was highly effective. There’s no reason to hit those sites anytime soon,” said Sen. Lindsey Graham, R-S.C.

Democrats remained doubtful and criticized Trump for not giving Congress more information. Senate Democratic leader Chuck Schumer of New York said the briefing “raised more questions than it answered.”

Sen. Chris Murphy, D-Conn., said the strike appears to “have only set back the Iranian nuclear program by a handful of months.”

“There’s no doubt there was damage done to the program,” said Murphy, but “allegations that we have obliterated their program just don’t seem to stand up to reason.”

“I just do not think the president was telling the truth when he said this program was obliterated,” he added.

The session came as senators weighed their support for a resolution affirming that Trump should seek authorization from Congress before launching more military action against Iran. A vote on that resolution could come as soon as Thursday.

Democrats, and some Republicans, have said the White House overstepped its authority when it failed to seek the advice of Congress. They also want to know more about the intelligence that Trump relied on when he authorized the attacks.

A similar briefing for House members will be held today.

A preliminary U.S. intelligence report found that Iran’s nuclear program had been set back only a few months, contradicting statements from Trump and Israeli Prime Minister Benjamin Netanyahu about the status of Iran’s nuclear facilities, according to two people familiar with the report.

They were not authorized to discuss the matter publicly and spoke on condition of anonymity.

“You want to call it destroyed, you want to call it defeated, you want to call it obliterated — choose your word. This was an historically successful attack,” Hegseth said at a Pentagon briefing Thursday.

On Wednesday, Director of National Intelligence Tulsi Gabbard and Ratcliffe sent out statements backing Trump’s claims that the facilities were “completely and fully obliterated.”

Gabbard posted on social media that “new intelligence confirms what @POTUS has stated numerous times: Iran’s nuclear facilities have been destroyed.” She said that if the Iranians choose to rebuild the three facilities, it would “likely take years to do.”

Ratcliffe said in a statement from the CIA that Iran’s nuclear program has been “severely damaged.” He cited new intelligence “from a historically reliable and accurate source/method that several key Iranian nuclear facilities were destroyed and would have to be rebuilt over the course of years.”

Most Republicans have defended Trump and hailed the tentative ceasefire he brokered in the Israel-Iran war.

House Speaker Mike Johnson, R-La., went as far as to question the constitutionality of the War Powers Act, which is intended to give Congress a say in military action.