Florida Shooting Updates: 3 Sailors Who Were Killed Are Identified

What was missing was any assurance that the Saudis would aid in the investigation, help identify the suspect’s motives, or answer the many questions about the vetting process for a coveted slot at one of the United States’ premier schools for training allied officers. Or, more broadly, why the United States continues to train members of the Saudi military, which has been accused of repeated human rights abuses in Yemen.

“The attack is a disaster for an already deeply strained relationship,” Bruce Riedel, a scholar at the Brookings Institution and a former C.I.A. officer who has dealt with generations of Saudi leaders, said on Saturday. It “focuses attention on Americans training Saudi Air Force officers who are engaged in numerous bombings of innocents in Yemen, which is the worst humanitarian catastrophe in the world,” Mr. Riedel said, noting that the Trump administration had been fighting efforts in Congress to end American support for that war.

For the White House, the calculus is simple: Saudi Arabia is critical to the world’s oil supplies — though no longer to the United States’ — and it is the only Gulf power willing and able to counter Iran. Former members of the Trump administration say that as a result, the administration has been dismissive of any critiques that could weaken ties between Washington and Riyadh.

At a Sunday church service in Pensacola, Representative Matt Gaetz, a Republican who represents the area in Congress, said he told the Saudi ambassador “in no uncertain terms” that “no interference” from the kingdom would be allowed in the shooting investigation, even as authorities seek to determine whether the attack was the product of any conspiracy or received financing from overseas.

“We will have no stone unturned,” Mr. Gaetz said.

[Read more about the attack’s effect on U.S.-Saudi relations.]

The military has no plans to shut down the training program for foreign officers that the gunman attended.

Secretary of Defense Mark T. Esper said on “Fox News Sunday” that the Pentagon would be reviewing screening procedures for foreign nationals on American military bases but would maintain the training programs.

“The ability to bring foreign students here to train with us, to understand American culture, is very important to us,” he said. “We have something that our potential adversaries, such as Russia and China, don’t have.”