Try doing some research on Robinson, everything was discussed on HC at the time, read the judgement where the judge discusses Robinson's admission of guilt.
Mueller is still in play, I gave you the link to the second installment, knock yourself out.
As for your whistleblower comments, you start off with a red herring and follow up with the cry baby defense.
The whistleblower never claimed to have firsthand knowledge of the call, (nor has anyone else claimed the whistleblower had firsthand knowledge of the call).
The whistleblower could be the biggest never Trump in the whole universe, it still does not negate what trump did.
