Q. Why now
A. Trump's desperate to change the conversation, and will do almost anything to do so - no matter who it hurts, as long as it's not him.
The real answer is...The Law.
It states that those files must be released no later than October 26, 2017.
If he wanted to change the conversation he doesn't need to release the JFK
files...just have Session convene a grand jury and let them indict,
HRC, Slick Willie, Zero, Zero's atty General and Mueller all on the
Uranium One deal. That'll changed the conversation in a big hurry when
the Grand Jury indicts every fucking one of them