NBC News is reporting tonight that the rooftop from which the shooter tried to assassinate Trump was deemed a security vulnerability before the rally by the Secret Service.

But since the rooftop was outside the venue, the Secret Service says it was the responsibility of local law enforcement.

Here’s more:

The rooftop where a gunman shot at former President Donald Trump during a campaign rally was identified by the Secret Service as a potential vulnerability in the days before the event, two sources familiar with the agency’s operations told NBC News.

The building, owned by a glass research company, is adjacent to the Butler Farm Show, an outdoor venue in Butler, Pennsylvania. The Secret Service was aware of the risks associated with it, the sources said.

“Someone should have been on the roof or securing the building so no one could get on the roof,” said one of the sources, a former senior Secret Service agent who was familiar with the planning.

Understanding how the gunman got onto the roof — despite those concerns — is a central question for investigators scrutinizing how a lone attacker managed to shoot at Trump during Saturday’s campaign event.

The Secret Service worked with local law enforcement to maintain event security, including sniper teams poised on rooftops to identify and eliminate threats, Secret Service spokesman Anthony Guglielmi said. But no officers were posted on the building used by the would-be assassin, outside the event’s security perimeter but only about 148 yards from the stage — within range of a semiautomatic rifle like the one the gunman was carrying.

The blame game…

The Secret Service had designated that rooftop as being under the jurisdiction of local law enforcement, a common practice in securing outdoor rallies, Guglielmi said.Butler County District Attorney Richard Goldinger said his office maintains an Emergency Services Unit team, which deployed four sniper teams and four “quick response teams” at the rally. But he said the Secret Service agents were in charge of security outside the venue.

“They had meetings in the week prior. The Secret Service ran the show. They were the ones who designated who did what,” Goldinger said. “In the command hierarchy, they were top, they were No. 1.”

Goldinger said the commander of the Emergency Services Unit told him it was not responsible for securing areas outside the venue. “To me, the whole thing is under the jurisdiction of the Secret Service. And they will delineate from there,” he said.

The former senior Secret Service agent also said that even if local law enforcement “did drop the ball,” it’s still the agency’s responsibility “to ensure that they are following through either beforehand or in the moment.”

“Just because it is outside of the perimeter, it doesn’t take it out of play for a vulnerability, and you’ve got to mitigate it in some fashion,” the source added.

At the end of the day, it is the role of the Secret Service to protect Trump and, the way I see it is that they should have ensured that someone from local law enforcement was monitoring that rooftop. Otherwise they can’t say he’s fully protected and in this case, it’s clear that Trump was not.