The name John McCain’s going to start popping up in this conspiracy.
I don't think it is likely he was involved in the early stages of the dossier. I haven't seen any reports that suggest McCain knew about it before the election, but it highly possible since the detestable Harry Reid was squawking about the dossier at the end of October. Since the dems are in the minority, they needed some never Trumper Rinos like McCain to thwart Trump. Senile old McCain was the perfect conduit to make it look bi-partisan.