Brennan declined to provide any indication about the identity of those people.
Robert Mueller led the FBI for 12 years under Presidents George W. Bush and Barack Obama, NBC News reports.
Palantir hones a reputation as a secretive outfit, but Peter Thiel is now part of the most visible entity on Earth—the Trump administration.
At the Senate Select Intelligence Committee hearing on "World Wide Threats," Sen. Mark Warner (D-Va.), Committee vice chair, asks the testifying panel including Acting FBI Director Andrew McCabe and Daniel Coats, National Intelligence director, about the investigation into Russian interference in the 2016 elections.
Kevin Mandia, FireEye CEO, talks about the company's growth strategy and what he is watching in securing cloud security.
Kevin Mandia, FireEye CEO, discusses how the evolving rate of technology is forcing many companies to rethink their long-term approach to cybersecurity.
CNBC's Kayla Tausche takes a look at expectations for the Senate Intelligence Committee's annual hearing on "Worldwide Threats."
A former top government official said the White House reminds him of a "runaway train" following the latest revelations, NBC News reports.
Trump is facing new questions about political interference in the investigations into Russian election meddling following reports that White House officials secretly funneled material to the chairman of the House intelligence committee.
Trump and his companies have been linked to at least 10 wealthy former Soviet businessmen with alleged ties to criminal organizations or money laundering.
Amazon's service interruption, though not nearly bad enough to spark panic, was viewed by some as a moment for reflection, the NYT reports.
Contractors likely breached security and handed over documents describing the CIA's use of hacking tools to WikiLeaks.
An agent on China missions lamented the language barrier in one of the new documents released by WikiLeaks on Tuesday, the SCMP reports.
NBC News reports that Trump has asked a New York billionaire to conduct a review of U.S. intelligence agencies and other aspects of the federal government.
If this was indeed an assassination, it was almost certainly North Korean in origin, according to Professor Hazel Smith. NBC News reports.
Members of the Trump campaign had repeated contacts with senior Russian intelligence figures, NBC News reports.
It’s not entirely clear what those aides hope to gain by undermining their boss' legitimacy, writes Vox's Yochi Dreazen.
The U.S. Senate confirmed Representative Mike Pompeo to be President Donald Trump's Central Intelligence Agency director on Monday.
The outgoing CIA director charged on Sunday that Donald Trump lacks a full understanding of the threat Moscow poses to the United States.
CNBC Eamon Javers reports the latest on the confirmation hearing for Donald Trump’s CIA pick Mike Pompeo.