WASHINGTON, DC - JANUARY 10: Mark R. Warner (D-VA), Vice Chair of the Senate Select Committee on Intelligence, speaks during the Senate (Select) Intelligence Committee in the Dirksen Senate Office Building on Capitol Hill January 10, 2017 in Washington, DC. The committee was holding a hearing about cyber threats to the United States and fielded questions about effects of Russian government hacking on the 2016 presidential election. (Photo by Joe Raedle/Getty Images)
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Sen. Warner: Flynn incident a real concern
Erin Burnett Out Front
Sen. Mark Warner, the ranking Democrat on the Senate intelligence committee, says there appears to be no evidence that the Trump administration appropriately vetted former national security adviser Michael Flynn.
0:38 • Source: CNN
Retired Lt. General Michael Flynn 15 videos
WASHINGTON, DC - JANUARY 10: Mark R. Warner (D-VA), Vice Chair of the Senate Select Committee on Intelligence, speaks during the Senate (Select) Intelligence Committee in the Dirksen Senate Office Building on Capitol Hill January 10, 2017 in Washington, DC. The committee was holding a hearing about cyber threats to the United States and fielded questions about effects of Russian government hacking on the 2016 presidential election. (Photo by Joe Raedle/Getty Images)
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Sen. Warner: Flynn incident a real concern
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Paul Manafort President Donald Trump Michael Flynn
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NYT: Trump lawyer floated Flynn, Manafort pardons
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White House Press Secretary Sarah Sanders speaks during the daily briefing in the Brady Briefing Room of the White House on March 27, 2018 in Washington, DC. (MANDEL NGAN/AFP/Getty Images)
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White House dodges questions over pardons
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FILE - In this Feb. 1, 2017 file photo, National Security Adviser Michael Flynn speaks during the daily news briefing at the White House, in Washington. A lawyer for former national security adviser Flynn has told President Donald Trump's legal team that they are no longer communicating with them about special counsel Robert Mueller's investigation into Russian election interference, according to a person familiar with the decision who spoke to The Associated Press on condition of anonymity. (AP Photo/Carolyn Kaster, File)
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Trump's praise of Michael Flynn over the years
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Trump compares Flynn to Hillary Clinton
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John Dowd, attorney for Raj Rajaratnam, founder of Galleon Group LLC, arrives at federal court for a court conference in New York, U.S., on Wednesday, Feb. 17, 2010. Rajaratnam's lawyers are seeking an "unfair strategic advantage" by bringing an insider-trading lawsuit to trial before the criminal case against the hedge fund founder, U.S. prosecutors told a judge. Photographer: Jin Lee/Bloomberg via Getty Images
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Trump's lawyer says he wrote Flynn tweet
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FILE - In this Feb. 1, 2017 file photo, National Security Adviser Michael Flynn speaks during the daily news briefing at the White House, in Washington. A lawyer for former national security adviser Flynn has told President Donald Trump's legal team that they are no longer communicating with them about special counsel Robert Mueller's investigation into Russian election interference, according to a person familiar with the decision who spoke to The Associated Press on condition of anonymity. (AP Photo/Carolyn Kaster, File)
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The timeline of Flynn's contacts with Russia
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WASHINGTON, DC - JANUARY 20: Retired Army Lt. General Michael Flynn arrives for the Presidential Inauguration of Donald Trump at the US Capitol on January 20, 2017 in Washington, DC. Flynn is appointed National Security Advisor to Trump. Donald J. Trump will become the 45th president of the United States today. (Photo by Saul Loeb - Pool/Getty Images)
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Source: Flynn wanted Russian sanctions removed
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Crucial 48 hours at Mar-a-Lago may hold answers
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Trump responds to questions about Flynn plea
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NEW YORK, NY - NOVEMBER 17: Retired Lt. Gen. Michael Flynn gestures as he arrives at Trump Tower, November 17, 2016 in New York City. President-elect Donald Trump and his transition team are in the process of filling cabinet and high level positions for the new administration. (Photo by Drew Angerer/Getty Images)
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Michael Flynn in 60 seconds
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Former Trump national security adviser Michael Flynn, center, arrives at federal court in Washington, Friday, Dec. 1, 2017. Court documents show Flynn, an early and vocal supporter on the campaign trail of President Donald Trump whose business dealings and foreign interactions made him a central focus of Mueller's investigation, will admit to lying about his conversations with Russia's ambassador to the United States during the transition period before Trump's inauguration. (AP Photo/Susan Walsh)
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Flynn says he's cooperating with Mueller
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NEW YORK, NY - DECEMBER 12: Retired Lt. Gen. Michael Flynn, President-elect Donald Trump's choice for National Security Advisor, waits for an elevator in the lobby at Trump Tower, December 12, 2016 in New York City. President-elect Donald Trump and his transition team are in the process of filling cabinet and other high level positions for the new administration. (Photo by Drew Angerer/Getty Images)
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Flynn lawyers cut off talks with Trump team
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WASHINGTON, DC: National Security Adviser Michael Flynn listens to remarks at the National Prayer Breakfast where U.S. President Donald Trump spoke February 2, 2017 in Washington, DC. (Win McNamee/Getty Images)
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Sources: Russians bragged about using Flynn
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NEW YORK, NY - NOVEMBER 29: General Mike Flynn, Donald Trump's new national security adviser, arrives at Trump Tower on November 29, 2016 in New York City. President-elect Donald Trump and his transition team are in the process of filling cabinet and other high level positions for the new administration. (Photo by Spencer Platt/Getty Images)
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What did Mike Pence know about Flynn?
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