New reporting this week that the US was compelled to extract a top-secret intelligence asset from Russia in part because President Donald Trump revealed classified information to the Russians landed with a bang in the national security apparatus.

On the one hand, former officials told Insider, the news wasn't surprising given Trump's long history of deriding the intelligence community.

On the other hand, the implications of this development — that a US spy was extracted at least in part because the president could not be trusted to protect the person's identity — floored intelligence veterans because it confirmed some of their worst fears about Trump.

"It's difficult to fathom," one former CIA and NSA official said. "For most of us, in order to gain access to this kind of information, we go through countless briefings in which desk tops are pounded saying how important and how dangerous these secrets are."

A former FBI agent told Insider it wouldn't surprise him if the US had to extract other human intelligence sources for their own safety over concerns about Trump's actions.

"Do you not inform the president of the United States of sensitive information because he might compromise it?" the former agent said. "It's a hell of a spot to be in if you're in the intelligence business."

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The report this week that the US extracted a top spy from Russia in 2017 after President Donald Trump revealed classified information to two Russian officials landed with a bang in the national security apparatus.

On the one hand, the news wasn't surprising. The president has a long record of disavowing the intel community's findings, distorting its conclusions to suit his narrative, and publicly siding with hostile foreign powers over the US.

On the other hand, the stark implications of this development, first reported by CNN — that a US spy was extracted in part because the president could not be trusted to protect the person's identity — floored intelligence veterans because it confirmed some of the worst fears about Trump.

Robert Deitz, a former top lawyer at the CIA and the National Security Agency, told Insider his first reaction to the news was: "I told you so. Loose lips sink ships, and Trump has the loosest lips."

Still, he said, "it's difficult to fathom."

"For most of us, in order to gain access to this kind of information, we go through countless briefings in which desk tops are pounded saying how important and how dangerous these secrets are," Deitz said. "By contrast, the president is provided with this by virtue of his election, and this president in particular has no understanding how dangerous it is to share this information with the bad guys."

Read more: The US reportedly extracted a top spy from Russia after Trump revealed classified information to the Russians in an Oval Office meeting

Trump with Russian Foreign Minister Sergey Lavrov and Sergei Kislyak, then Russia's ambassador to the US, at the White House on May 10, 2017. Russian Foreign Ministry Photo via AP

'The kind of thing that costs lives'

The New York Times reported on Monday that the asset was a mid-level Russian official the CIA had cultivated decades ago who had rapidly moved up through the ranks of the Russian government. Eventually, the report said, the source became invaluable after landing "an influential position" that included access to Russian President Vladimir Putin.

But as the US learned the extent to which Russia was interfering in the 2016 election, and as the media reported on it and began to examine the CIA's sources in the Kremlin, US officials reportedly worried about the source's safety and decided to offer to extract the person in late 2016.

The person apparently refused, but officials' concerns were compounded when, in May 2017, Trump disclosed top-secret intelligence to senior Russian officials during an Oval Office meeting, CNN reported.

At the meeting, Trump shared intelligence connected to the Islamic State in Syria. The information came from Israel, which had not given the US permission to share it with the Russians because it could have compromised an Israeli source in the region.

Trump's disclosure at the meeting was not specifically related to the Russian spy. But his disregard of strict intelligence-sharing rules to protect highly placed sources "prompted intelligence officials to renew earlier discussions about the potential risk" that the source in Russia would be exposed, CNN reported.

Read more: 'He's losing his s---': Trump's advisers are increasingly worried about his mental state following days of erratic behavior

U.S. President Trump presents Presidential Medal of Freedom to NBA Hall of Famer West at the White House in Washington Reuters

Mike Pompeo, then the director of the CIA, also told senior Trump administration officials that too much information about the source in Russia was leaking out, according to CNN. The source was extracted soon after.

Deitz said the episode highlighted an irony in Trump's tendency to "degrade and devalue" the intel community's work and his simultaneous fascination with sharing its product with others.

"He constantly disparages the work and the information he gets from the intel community, but in a moment of preening he disclosed that information to the Russians in a one-on-one meeting," Deitz said. "He clearly knows it's important enough, or cool enough, to share with them."

Moreover, he added: "The Russians aren't stupid. They're going to track down how Trump learned that information and where it came from, and that's the kind of thing that costs lives."

Almost as critically, he said, it could compromise an important channel of information.

That wasn't the last time the president publicly revealed sensitive information. Late last month, Trump stunned experts when he tweeted out a photo taken by one of the US's most secretive spy satellites that was provided to him during a classified intelligence briefing.

Read more: The photo Trump tweeted out from a classified briefing likely came from one of the US's most secretive spy satellites

And in early 2018, the president declassified a highly controversial memo by Rep. Devin Nunes, then the chairman of the House Intelligence Committee, for political purposes. Trump's action went against the advice of senior intelligence officials who warned that its release could compromise sources and methods.

Rep. Devin Nunes of California. AP Photo/J. Scott Applewhite, File

'Do you not inform the president of the United States of sensitive information because he might compromise it?'

Frank Montoya Jr., a recently retired FBI special agent, told Insider it "would not surprise me at all" if Trump's actions, both public and private, had forced the US to extract other sources for their protection.

"Not only was there this particular meeting with the Russians, but what about his one-on-one encounters with Putin?" Montoya said. "What did Trump give up in those meetings that could have compromised sources and methods?"

The former agent also pointed to the myriad contacts that members of the Trump campaign had with Russians during the 2016 election and after.

"I don't think any of the professionals are running their mouths, but what of the Trump family members?" Montoya said. "All the unreported contacts outlined in the Mueller report have relevance in situations like this."

Glenn Carle, a longtime former CIA covert operative and vocal Trump critic, told Insider it'd been "obvious" to him since before Trump was elected that his approach to handling intelligence would endanger "sources and methods" as well as "lives of officers."

Former officials also pointed to Trump's frequent and puzzling defenses of Putin and Russia over the past several years.

Taken together, Carle said he believed there's "overwhelming" evidence that the US president was "at least compromised by Russian intelligence."

Montoya said he saw the president more as a "useful idiot" but that the end result was still the same.

Read more: US spies say Trump's G7 performance suggests he's either a 'Russian asset' or a 'useful idiot' for Putin

National security officials also stressed the time, energy, and resources that go into cultivating human intelligence sources.

Such sources are the most expensive to develop compared with forms of intelligence like signals intelligence, imagery intelligence, and others. Human intelligence is also typically the most fragile because it relies on people rather than technology.

The "tooth-to-tail ratio" for developing human sources is "terrible," Deitz said. Tooth-to-tail ratio is military jargon that refers to the amount of support (tail) it takes to protect an asset (tooth). "For every person in a country, there's a huge tail of support that's needed," Deitz said. "You actually have to give a s--- about your spies."

Then there's the risk of additional consequences down the road.

"If an asset was extracted, what does that mean for those who remained behind?" Montoya said. "Are they rethinking their relationships with the US? Are they refusing to talk to us anymore? Are others rejecting our approaches because we can't be trusted?"

"And what kind of position does that put our agencies in who run these assets?" he added. "Especially if those assets are run jointly with a friendly foreign [intelligence service]? Do you not inform the president of the United States of sensitive information because he might compromise it? It's a hell of a spot to be in if you're in the intelligence business."

In response to CNN's story about the spy's extraction, Brittany Bramell, the CIA's director of public affairs, told the outlet in a statement that "misguided speculation that the president's handling of our nation's most sensitive intelligence — which he has access to each and every day — drove an alleged exfiltration operation is inaccurate."

The White House press secretary, Stephanie Grisham, said in a statement to CNN that its reporting was "not only incorrect, it has the potential to put lives in danger."