Mary Louise Kelly

Reports are circulating that intelligence officials briefed President Obama and President-elect Trump on a dossier that is circulating which alleges Russia has compromising information about Trump.

There are a total of 17 U.S. spy agencies. The four that consistently make headlines will be back in the news on Tuesday. They are testifying about Russia before the Senate Intelligence Committee.

U.S. intelligence officials briefed President-elect Donald Trump Friday. Agencies say Russian President Vladimir Putin personally ordered a campaign to try to tip the election to Donald Trump.

Intelligence officials released a public version of the report detailing the findings on Russian cyber attacks during the 2016 election cycle.

A day after the Senate held a public hearing on Russia's cyber activities, Donald Trump gets his briefing. And, Trump's reported to have picked ex-Sen. Dan Coats to head National Intelligence.

Russia's alleged election-year hacking takes center stage when leaders of the intelligence community testify before Congress. Senate Armed Services Chairman John McCain has called the first of several expected hearings on the issue. This comes the day before President-elect Donald Trump is scheduled to receive an intelligence briefing on Russian hacking.

The director of National Intelligence and the head of the NSA are among those called to testify before the Senate Armed Services Committee on alleged Russian meddling in the 2016 election.

Why is it so hard to make public the evidence that Russia was behind the election hacks? A look at the inherent challenge facing a secret spy service operating in a democracy.

In an interview with NPR, CIA Director John Brennan talked about Russian hacking, the ongoing conflict in Syria and his plans for life as a civilian after he leaves his post in January.

As head of U.S. counterintelligence, William Evanina's job is to stop America's enemies from spying here. "We spend a lot of time fixing what's happened," he says. He'd like to see greater prevention.

Intelligence sources tell NPR that the FBI agrees with the CIA's assessment that Russia interfered in the U.S. election, in part, to help Donald Trump.

President Obama says there's a need to develop new rules as countries increasingly spy on each other in cyberspace. The U.S. is particularly vulnerable because so much of the economy is digitized.

In an interview with President Obama's Homeland Security and Counterterrorism Adviser, Lisa Monaco, she says the Obama administration may yet respond more forcefully to Russian cyber-intrusions.

The situation Pompeo now faces would test the savviest politician: If confirmed, he will go to work for a president who is openly feuding with the agency he's preparing to run.

What is the state of the various investigations underway into Russian cyber-intrusions? What are the key questions that Congress is trying to answer? And how much of the currently classified evidence can be made public? The CIA is weighing what it can share, without compromising what are known as "sources and methods."

The CIA believes Russia interfered with the presidential election in order to tip it to Donald Trump. Trump calls the claim "ridiculous." Four senators have called for a sweeping investigation.

The CIA has concluded that Russia launched a cyberintelligence operation to influence the U.S. election in an apparent effort to help Donald Trump win, a U.S. official tells NPR.

NPR has confirmed that intelligence officials say it's now "quite clear" Russian hackers worked to tip the presidency in Donald Trump's favor. Trump's transition team has dismissed the assessment.

President-elect Trump has been opting out of his presidential intelligence briefings and continuing to reject the assessment of the intelligence community that Russia interfered in the presidential election. Meanwhile, both Republicans and Democrats are calling for the outgoing Obama administration to release more evidence about Russia's cyber-mischief and for Congress to investigate on its own.

President-elect Trump plans to nominate at least three former top generals to his cabinet, and he is said to be considering more former top four-star military commanders. NPR takes a look at why Trump favors the brass and what effect a cabinet of such leaders could have on the way he runs the government.