The meeting occurred before Nunes disclosed at a news conference that USA spy agencies may have inadvertently captured Trump and his associates in routine targeting of foreigners' communications.
ANunes spokesman said that Nunes went to the Eisenhower Executive Office Building, on White House grounds, to view the classified information that he would then announce the following day.
Furthermore, according to MSNBC, Nunes was on the White House grounds to make use of a SCIF - a sensitive compartmented information facility - where he could meet his source and review the documents in question.
Langer says Nunes has been concerned that Trump associates had been captured in incidental US surveillance of foreign targets even before Trump made his baseless claims that former President Obama wiretapped him previous year.
Last week, White House Press Secretary Sean Spicer denied that the administration was involved in providing the intelligence to Nunes.
But questions about how Nunes received intelligence intercepts - that he described as routine, legal surveillance that picked up conversations with Trump aides during the transition - have raised new doubts about his panel's ability to conduct a nonpartisan inquiry.
Kristol said, "In terms of security, it's just like the White House".
Nunes told CNN he had been working on nailing down the surveillance information before Trump's unsubstantiated claim earlier this month that he was wiretapped by President Barack Obama.
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An official who spoke with media Saturday said there's no information that suggests the two incidents have any connection. Police do not believe there are additional suspects and the matter is not being treated as an active shooter situation.
He added that Nunes' reported behavior - two congressional sources told CNN Nunes was with a staff member Tuesday night when he got a message, got out of the vehicle and got into an Uber, and staff didn't hear from him again that night - was "bizarre" and "loopy".
That's bad news for Trump, but it's even worse news for an ambitious lawmaker getting his first time on the national stage - and making so many missteps that he's now facing criticism from fellow Republicans, calls that he be replaced as head of the intelligence committee, and growing pressure for an independent probe that would bypass his committee entirely.
Two congressional sources said Nunes was with a staff member Tuesday night when he got a message, got out of the auto and got into an Uber.
"I very much appreciated the fact that they found what they found", the president said.
Democrats, and some Republicans, have said Nunes' actions raised serious questions over whether his committee would be able to conduct an impartial investigation of Russian hacking, the USA election and any potential involvement by Trump associates.
"I hope ... he either comes to his senses or maybe Speaker Ryan replaces him", Schumer said of the GOP chairman on CNN's "Situation Room".
Several congressional committees, as well as the Federal Bureau of Investigation and the US intelligence community, are investigating Russian meddling in the USA election, including the hacking and release of Democratic emails.