The Defense Intelligence Agency report appeared to focus on the enrichment process at the sites where the GBU-57 bunker-busters, among the most powerful in the U.S. arsenal, were used. Later analysis by outside groups suggested that the biggest loss for Iran might have been the destruction of facilities to turn that fuel into a weapon. In particular, damage to a laboratory under construction in the nuclear complex outside the ancient city of Isfahan, which is intended to convert enriched uranium into a metal, may prove a major bottleneck in Iran’s ability to convert highly enriched uranium into the metal that is needed to produce a weapon.

Rebuilding that capability, other experts have said, could take years. And much depends on whether Iran throws out I.A.E.A. inspectors — who remained in Tehran throughout the conflict with Israel earlier this month — or whether it decides to conduct its work in the open. Either way, it could be bombed again, as Mr. Trump has said in recent days he is quite willing to do.

But in an interview over the weekend, Mr. Trump repeated his insistence that Iran had given up its nuclear ambitions because the American attack had “obliterated” its facilities, a term he used just moments after the B-2 bombers had dropped their payload the prior weekend.

He has since threatened to sue CNN and The New York Times for citing the Defense Intelligence Agency report, and on Sunday, in a Fox News interview, he suggested that he would go further, using the legal system to force reporters to reveal their sources. (The Justice Department recently retracted rules that made the subpoena of reporters a move of last resort as it tried to track down sources of information.)