The Obama campaign paid 972K to the same law firm that hired Fusion at the same time the Clinton campaign and DNC did. I think there was collusion between the three to nuke the Trump candidacy, but I also suspect deep down Obama knew Hillary may not win, so he created a bogus document to justify using the law enforcement institutions of govt to officially investigate the Trump team.
There was severe criminal abuse of the system by the Obama admin and their sychophants for partisan gain. After Mueller is done finding nothing, a new investigation needs to begin into the matter.