Emerging from a highly anticipated classified briefing on Thursday, Democratic and Republican senators were not in agreement over exactly how much US strikes on Iran set back that country’s nuclear program.

Andrew Harnik/ The Trump administration insists the answer is an unqualified yes — the nuclear sites were “completely and totally obliterated,” according to President Donald Trump. Yet questions remain about the efficacy of the attacks after an early intelligence assessment from the Defense Intelligence Agency reportedly concluded that the strikes may have only set back Iran’s nuclear program for months.