Former Trump campaign chairman Paul Manafort talks to reporters on the floor of the Republican National Convention in 2016. Prosecutors say Manafort "brazenly violated the law."
White House counsel Don McGahn has cooperated extensively in the Mueller inquiry, meeting with the special counsel's team of investigators for a total of 30 hours.
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Lawyers for Michael Cohen said an explosive document released about him this week was full of false information, although they did concede payments from some corporate clients.
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Senate Judiciary Committee Chairman Chuck Grassley confers with ranking member Dianne Feinstein at a committee hearing on April 19. The committee has approved legislation to protect special counsel Robert Mueller's investigation.
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Special counsel Robert Mueller at the Capitol in June. The New York Times reports President Trump intended to fire him that month but was dissuaded by White House Counsel Don McGahn.
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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.
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