One thing we can be sure of: Obama Knew.
I believe this is key to the explanation on how president Trump is handling this situation. To me it seems as though president Trump is slowly moving the ball forward in advancing the notion in the zeitgeist that Obama was behind this and much more.
Obama is slowly being roped into this as the pervasiveness of the corruption by all levels of the Obama administration is being exposed and known.
Some things to remember and man a time line would help here:
Transforming the public perception of Obama as this hip cool first black president into a creepy corrupt chicago scam spying on all his political opponents needs to happen over a period of time. This is what president Trump seems to be doing or what is just playing out.
Getting the perception into the common sense that Obama did this skulduggery then starting to have prosecutions move forward against lower level lieutenants - unpeeling the onion of corruption and deceit that is Obama.
With president Trump at the helm eventually the public is going to see chapter and verse what crooked people these Obama administration types were and what they did. He was saying this in the campaign.