It has come to light that the FBI edited down FBI Director Comey's investigation of Hillary in order to make it look like nothing was amiss. Comey's conclusion that Hillary was "grossly negligent," a conclusion justifying felony indictment for mishandling of classified information, was replaced with "extremely careless." You can read about the rewire here: http://thehill.com/policy/national-security/367528-comeys-original-clinton-memo-released-cites-possible-violations
The Chairman of the US Senate Homeland and Government Affairs Committee, Ron Johnson (R, Wis) has asked the current FBI director, Chris Wray, if the document was rewritten in order to protect Hillary. Senator Johnson is particular interested in the emails that show that some senior FBI officials were determined to prevent Trump from becoming US President.