Robert Mueller Robert Mueller

President Trump, seen in the Roosevelt Room of the White House, lashed out in a series of tweets at the FBI after his former national security adviser's guilty plea in the Russia probe. Pool/Getty Images hide caption

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Pool/Getty Images

President Trump meets with congressional leaders in the Oval Office at the White House on Sept. 6. The deadline to fund the government and raise the debt ceiling is coming up on Dec. 8. Alex Wong/Getty Images hide caption

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Alex Wong/Getty Images

President Trump shakes hands with Russian President Vladimir Putin, as they pose for a group photo ahead of the Asia-Pacific Economic Cooperation Summit leaders gala dinner in Vietnam last week. Mikhail Klimentyev/AFP/Getty Images hide caption

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Mikhail Klimentyev/AFP/Getty Images

George Papadopoulos, left, pleaded guilty earlier this month to lying to FBI agents about a series of meetings he took and planned while he was a foreign policy adviser to the Trump campaign. Costas Bej/Courtesy of The National Herald hide caption

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Costas Bej/Courtesy of The National Herald

Special counsel Robert Mueller departs after a closed-door meeting in June with members of the Senate Judiciary Committee. There are two bipartisan proposals aimed at making sure he is not fired from that post. J. Scott Applewhite/AP hide caption

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J. Scott Applewhite/AP

President Trump's supporters have a history of manufacturing story lines to undermine opponents. Is that what's going on with floating the possibility of firing special counsel Robert Mueller? Chip Somodevilla/Getty Images hide caption

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Chip Somodevilla/Getty Images

Sens. Mark Warner, D-Va., and Richard Burr, R-N.C., lead the Senate Intelligence Committee, which is investigating Russian meddling in the 2016 presidential election. Tasos Katopodis/AFP/Getty Images hide caption

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Tasos Katopodis/AFP/Getty Images

Robert Mueller, the Justice Department's pick as special counsel in the investigation into Russia's role in the 2016 elections, has been cleared of any conflicts of interests related to the work of his former law firm. Evan Vucci/AP hide caption

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Evan Vucci/AP