Actually there was Russian Collusion but it was of the Hillary campaign via Fusion GPS and Christopher Steel.
I myself have always thought the dossier was a total product of Fusion GPS (bought and paid for by the DNC and Hillary) and Christopher Steel was just to give it legitimacy.
One must never forget that the Russian lawyer sent to Trump with supposed dirt on Hillary meet with Fusion GPS before the meeting and after the meeting. This is not a coincidence. The meeting was vital to give a reason to wiretap Trump.
The FISA court should be shut down as it is a danger to America.
Now that the Mueller report is out, the DoJ will be going on the offensive. Investigations have been ongoing for a long time, criminal referrals have been made to a DoJ that will act on them (unlike the DoJ under 0bola), and there is a lot of action happening under the radar of the media.
The hunter will now be the hunted.