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

Then-FBI Director James Comey testifies during a Senate Judiciary Committee hearing on May 3. Comey was fired May 9 after more than a year of controversy surrounding the FBI's investigation into Hillary Clinton's email server. Carolyn Kaster/AP hide caption

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Carolyn Kaster/AP

FBI Director Robert Mueller is sworn in on on Capitol Hill in Washington, on Thursday. J. Scott Applewhite/AP hide caption

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J. Scott Applewhite/AP

Mueller Responds To Nadler

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President Obama is expected to nominate James Comey, seen in 2004, to be the next director of the FBI. Mark Wilson/Getty Images hide caption

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Mark Wilson/Getty Images

Former Deputy Attorney General James B. Comey waits to testify before the Senate Judiciary Committee in Washington on May 15, 2007. NPR has learned that Comey is in line to become President Obama's choice as the next FBI director. Susan Walsh/AP hide caption

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Susan Walsh/AP

Former Justice Official In Line To Be Named FBI Chief

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