# John Brennan Director of the Central Intelligence Agency (2013–2017), the most prominent US intelligence official to publicly characterize Trump's behavior toward [[Russia]] in the harshest terms. Brennan's post-Helsinki statement calling Trump's conduct **"nothing short of treasonous"** remains the most extreme public assessment of Trump-Russia by a former intelligence chief. ## Pre-Election Intelligence As CIA Director, Brennan was among the first senior US officials to receive intelligence about Russian interference in the 2016 election. In the summer of 2016, he received intelligence from a foreign partner service indicating Russian attempts to influence the election. He briefed [[President Obama]], congressional leaders (the "[[Gang of Eight]]"), and was involved in the inter-agency effort to assess and respond to the threat. Brennan later testified that he became concerned about contacts between Trump campaign associates and Russian officials, and that he shared intelligence with the FBI that "served as the basis for the FBI investigation." He emphasized he was concerned not about political partisanship but about "individuals who may wittingly or unwittingly be involved in activity on behalf of the Russians." ## The Helsinki Reaction After the [[Helsinki Summit 2018]], where [[Donald Trump]] publicly sided with [[Vladimir Putin]] over US intelligence agencies on election interference, Brennan tweeted: **"Donald Trump's press conference performance in Helsinki rises to & exceeds the threshold of 'high crimes & misdemeanors.' It was nothing short of treasonous."** This was the most extreme public statement by any former intelligence official about a sitting president's behavior with a foreign adversary. It captured the intelligence community's alarm but also drew criticism for being hyperbolic and political. ## Security Clearance Revocation In August 2018, Trump revoked Brennan's security clearance — an unprecedented action against a former CIA director, widely seen as political retaliation for Brennan's public criticism. Former intelligence officials across party lines condemned the revocation. ## Significance Brennan represents the intelligence community's most vocal alarm about Trump-Russia. His "treasonous" characterization at Helsinki, his security clearance revocation, and his public testimony about pre-election intelligence all mark him as the intelligence establishment's most prominent voice warning about the Trump-Russia relationship. Whether one views him as a patriotic whistleblower or a partisan actor depends on one's assessment of the underlying evidence — evidence that the [[Mueller Investigation]] and [[Senate Intelligence Committee]] substantially corroborated.