Comey also originally concluded that it was "reasonably likely" that Clinton's nonsecure private server was accessed or hacked by hostile actors though there was no evidence to prove it. But that passage was also changed to the much weaker "possible," the memos show.

The full draft and edits were released on the website of Senate Homeland and Government Affairs Committee Chairman Ron Johnson (R-Wis.), providing the most complete public accounting to date of Comey's draft and the subsequent edits.

The draft, released in full for the first time on Thursday, offers new details on the FBI's Clinton investigation and controversial conclusion.