As the Pentagon insists that the attack by B-2 bombers that dropped powerful 30,000-pound bunker-buster bombs on two uranium enrichment plants in Iran was a crime, some Senate Democrats questioned the official account.

They even called the Trump administration’s alleged military buildup against Iran’s nuclear facilities “a mischaracterization.”

In recent days, President Trump repeatedly declared “total annihilation” after three nuclear sites were bombed in a secret U.S. strike.

Meanwhile, an initial classified assessment found that the attacks set back Tehran’s nuclear program by months, while Trump said the nuclear program was set back “basically decades.”

Democrats questioned claims about how much Iran’s nuclear program has been hampered, according to CBS News.

“I left that briefing convinced that we did not destroy the program,” Sen. Chris Murphy, D-Conn., told reporters. “The president deliberately misled the public by claiming the program had been destroyed. It’s true that considerable capability and equipment remain.”

“You can’t bomb knowledge out, no matter how many scientists you kill,” Murphy added. “There are still people in Iran who know how to use centrifuges. And if they still have enriched uranium and the capability to use centrifuges, you’re not setting the program back years. You’re setting it back months.”

Sen. Mark Warner of Virginia, the ranking Democrat on the Senate Intelligence Committee, suggested the administration jumped to a conclusion too soon.

“I hope that’s the final assessment,” Warner said. “But if not, does that end up giving a false sense of comfort to the American people?”

Senate Majority Leader Chuck Schumer, a New York Democrat, said he had not received adequate answers about whether the nuclear arsenal had been destroyed.

“What became clear is that there was no coherent strategy, no ultimate goal, no specific, detailed plan for how Iran would not achieve a nuclear weapon,” Schumer said.

Democratic Sen. Richard Blumenthal of Connecticut said only a final battle damage assessment confirming the claims “would allow us to feel comfortable or complacent about what’s been done.”

“The fact of the matter is, we don’t know. Anyone who says we know for sure is making it up, because we don’t have a final battle damage assessment,” he said. “I think 'destroyed' is too strong a word, because it implies that it couldn't be reconstituted or that it was somehow completely eliminated.”

Still, Blumenthal praised the military action as “one that will go down in the annals of military history.”

“Certainly, this mission was successful to the extent that it extensively destroyed and perhaps severely damaged and delayed Iran’s nuclear weapons program. But the actual duration and scope of this attack will still be determined by the intelligence community itself,” he said.

Republican Sen. Lindsey Graham of South Carolina supported the administration’s characterization but acknowledged that Iran’s capabilities could eventually be restored.

“The real question is: Have we ended their desire for a nuclear weapon?” Graham said after the classified briefing. “I don’t want people to think that the site wasn’t severely damaged or destroyed. It was. But that said, I don’t want people to think the problem is over, because it’s not.”

Graham said he believes the program had been years behind schedule. Republican Sen. Kevin Cramer of North Dakota expressed confidence that “it’s significantly delayed, at least a year.”

Republican Sen. Tom Cotton of Arkansas, chairman of the Senate Intelligence Committee, said the attacks “effectively destroyed Iran’s nuclear program.” Cotton added that the initial assessment had several intelligence gaps and “assumed a worst-case scenario, with ideal conditions in Iran.”

Senior intelligence officials said Wednesday that new intelligence shows the nuclear program has been “severely damaged” and its facilities “destroyed.” It will take the Iranians “years” to rebuild the facility, according to CIA Director John Ratcliffe and Director of National Intelligence Tulsi Gabbard.