"I think he is afraid of the Russian president," says former CIA chief John Brennan.

Trump’s incessant fawning over Russian President Vladimir Putin, despite the country’s blatant attack on America’s 2016 elections, continues to raise alarm among seasoned national security and intelligence veterans.

“I think he is afraid of the Russian president,” former CIA chief John Brennan said on MSNBC Wednesday morning. “The Russians may have something on him personally to roll out and make his life more difficult.”

Brennan did not elaborate on whether he thinks Russian operatives have dirt on Trump’s personal life, his business connections, or both.

“The fact that he has had this fawning attitude toward Mr. Putin, has not said anything negative about him, I think continues to say to me that he does have something to fear and something very serious to fear,” Brennan stressed.

The new alarms are being rung after Trump called Putin on Tuesday to congratulate him for winning another sham, undemocratic election.

Incredibly, Trump did this against the explicit warning from his advisers.

“Trump did not follow specific warnings from his national security advisers [yesterday] when he congratulated … Putin on his reelection — including a section in his briefing materials in all-capital letters stating ‘DO NOT CONGRATULATE,'” the Washington Post reported.

“Just look at what happened yesterday with his call to Vladimir Putin,” said Brennan. “Vladimir Putin was the person who authorized interference on our election. Vladimir Putin was involved in directing the poisoning of an individual on British soil, and to congratulate him and treat him so nicely while he treats Americans with such disdain, I think it just demonstrates he looks at the world through a prism of what is going to help and protect Donald Trump. That is not what presidents are supposed to do.”

Brennan is hardly alone in his alarming assessment.

Recently announcing his resignation from Fox News in disgust over its fawning Russia coverage, conservative military analyst Ralph Peters told colleague in an email that the so-called Russian dossier, which details the many ways Russian officials could have compromising information on Trump, is likely accurate.

“As an intelligence professional, I can tell you that the Steele dossier rings true — that’s how the Russians do things,” Peters wrote. “The result is that we have an American president who is terrified of his counterpart in Moscow.”

That’s what Brennan fears.