LOL, trigger warning!
Someone cannot handle answering to their own idio......er logic it seems.
Pity @Oceander , I thought better of you.
The fact is, one does not have an investigation in search of a crime. That is how the Stassi do it. Given the events with the FBI, I now understand how the East Germans felt.
No Oceander, one investigates with the probable cause of a crime. When the very basis of ones "investigation" is shown to be based on false info..lies , then the investigation is stopped, and those who put forth the lies which started a false investigation are themselves investigated, charged, tried and hopefully jailed.
That is the thin line of rule by law, or a banana republic/Stassi State.
It would seem you are guilty of projecting your own failings onto others. Namely.... having one's mind made up.
Carry on. It is at least amusing to watch such a yoga lesson in logic. 
Hiring someone who was trying to illegally hook up with Russian agents back in 2013 as a campaign adviser on foreign affairs, and then having this same moron start trying to get involved with the Russians again suggests that there is probable cause to believe the campaign might be illegally involved with Russian agents.
Meeting with Russians who are offering access to hacked emails and other information gives probable cause to believe that there might be a conspiracy to gain unlawful access to computer data, or possession of stolen computer data.
Probable cause deals in probsbilities, not certainties, so none of these possibilities has to be true.
Furthermore, the cops don’t even need probable cause to start an investigation; probable cause is generally the requirement for a warrant to issue of an arrest to be made.
A reasonable suspicion, which is less than probable cause, would almost certainly be enough to justify an investigation.
And Trump, through his own stupidity and incompetence, allowed his campaign staff to do things that gave rise to a basis for suspicion.
You want to point fingers? Point them and the incompetent boob sitting in the White House and his propensity for hiring idiots and rubes without adequate vetting. He finally seems to be learning from his mistakes, so he’s not irredeemable, but he is largely to blame for having given the democrats this opportunity.
