When the Left under Obama consolidated control of the Federal agencies from 2010thru 2016, they paid special attention to the FBI, the CIA and to a lesser extent the NSA. They realized like the Soviet Communists before them that control of these state agencies was important to wield political power. In many ways it is a testament to the strength of American democracy that their plot to scuttle Trump and rig the election for Clinton failed. Trump dropped the ball when he appointed Sessions . Comey, Lynch, Brennan, Clapper, Clinton and Obama should have been arrested Day 1 of the Administration.
What we will never know is how much information was shared BEFORE that time.