The investigation started without any evidence of a crime which makes it illegal.
See 4th Amendment:
Even if there was Russian Collusion you would not take it to a court of law because, by law, it can’t be submitted as evidence.
(Although you can try to smear people with it)
But there is no evidence as already stated by both Democrats and GOP Houses.
NO RUSSIAN COLLSION - Look it up.
And that’s why the House has opened another 81 investigations into Russian collusion and Trump - they are trying to keep the Narritave going at all cost.
Only a complete lying smacking fork wit would actually believe in the Russian Collusion.
In fact - all investigations led to collusion to the DNC and the Clintons colluding with the Russians - See Uranium One and Steel Dozier.
But shhh - we shall not talk about that.