Follow along with our live updates as we learn more:
Update Feb. 3, 2018 8:30 PM EST: President Donald Trump continued to comment on Twitter about the GOP memo Saturday evening.
Update Feb. 3, 2018 10:00 AM EST: President Donald Trump weighed in on the GOP memo on Twitter Saturday morning, saying the memo totally vindicates him.
Update Feb 2, 2018 10:29 PM EST: FBI director Chris Wray sent a letter to FBI employees after the release of the controversial Nunes memo Friday, saying "talk is cheap" and urging workers to "keep calm and tackle hard."
Update Feb 2, 2018 6:34 PM EST: Arizona Republican Sen. John McCain admonished fellow Republicans Friday shortly before the Nunes memo was released. "We are doing Putin's job for him," McCain said in a statement. “In 2016, the Russian government engaged in an elaborate plot to interfere in an American election and undermine our democracy,” he said. “Russia employed the same tactics it has used to influence elections around the world, from France and Germany to Ukraine, Montenegro and beyond.”
“The latest attacks on the FBI and Department of Justice serve no American interests – no party’s, no president’s, only Putin’s," McCain said referring to the controversial memo questioning the FBI and Justice Department's surveillance of a former Trump campaign staffer. "The American people deserve to know all of the facts surrounding Russia’s ongoing efforts to subvert our democracy, which is why Special Counsel Mueller’s investigation must proceed unimpeded. Our nation’s elected officials, including the president, must stop looking at this investigation through the warped lens of politics and manufacturing partisan sideshows. If we continue to undermine our own rule of law, we are doing Putin’s job for him.”
Update Feb 2, 2018 5:11 PM EST: A Republican lawmaker is calling for "criminal prosecution" of those who authorized the surveillance warrant of Carter Page, a former Trump campaign adviser, detailed in a controversial declassified memo released Friday. GOP Congressman Paul Gosar (R-AZ) said the FBI's surveillance of Page "constitutes treason." He released a statement on Twitter.
Update Feb 2, 2018 2:43 PM EST: White House press secretary Sarah Huckabee Sanders said the decision made Friday by Trump to declassify the memo released Friday was made with input from his national security team.
"The memorandum raises serious concerns about the integrity of decision made at the highest levels of the Department of Justice and the FBI to use the government's most intrusive surveillance tools against American citizens," she said.
Update Feb 2, 2018 2:40 PM EST: Attorney General Jeff Sessions on Friday said he will be in contact with officials at the Justice Department as he continues to get more information from Congress following the release of a controversial GOP memo.
He said he has "great confidence" in those at the Justice Department, but, he added, "no department is perfect."
Update Feb 2, 2018 1:52 PM EST: Former FBI Director James Comey criticized the decision to release the memo, writing on Twitter, "That's it?"
"(The) dishonest and misleading memo wrecked the House (Intelligence) Committee, destroyed trust with (the) intelligence community, damaged relationship with FISA court and inexcusably exposed classified investigation of an American citizen," Comey wrote. "For what? DOJ & FBI must keep doing their jobs."
Update Feb 2, 2018 1:46 PM EST: House Speaker Paul Ryan, R-Wisconsin, praised the decision to release the memo Friday and reiterated a call to release a second memo, written by the House Intelligence Committee's top Democrat, Adam Schiff, to counter Nunes' memo.
"I am glad that this memo helps to provide greater transparency (of America's FISA system), and I reiterate my support for the similar release of the minority's memo once it is properly scrubbed of all intelligence sources and methods. It is critical that we focus on specific actions and specific actors and not use this memo to impugn the integrity
Update Feb 2, 2018 1:23 PM EST: Former Secretary of State John Kerry called the memo a "dangerous, ugly ... assault on the integrity of the institutions of our country" in a statement after its release Friday.
"I lived through Watergate/Nixon: America pays a very steep price when a political party tries to undermine the institutions that hold us togheter - and the whole world suffers when that happens to America."
Update Feb 2, 2018 1:16 PM EST: House Minority Leader Nancy Pelosi, D-California, condemned the decision to release the memo, writing in a statement that "President Trump has surrendered his constitutional responsibility as Commander-in-Chief by releasing highly classified and distorted intelligence."
Officials with the Justice Department and the FBI previously urged lawmakers not to release the memo, arguing that it is inaccurate and missing necessary context.