"[I]nteractions between Russian Ambassador Kislyak and Trump Campaign officials both at the candidate's April 2016 foreign policy speech in Washington, D.C., and during the week of the Republican National Convention were brief, public, and non-substantive. ...[T]he investigation did not establish that one Campaign official's efforts to dilute a portion of the Republican Party platform on providing assistance to Ukraine were undertaken at the behest of candidate Trump or Russia. The investigation also did not establish that a meeting between Kislyak and Sessions in September 2016... included any more than a passing mention of the presidential campaign."