"Russian Collusion," was a label Trump promoted. The Demorats were the ones saying that it was not among the charges. I guess you didn't read the report accepted by the Trump DOJ. Obstruction of Justice was not ruled out. It just was not charged because of that memo that says sitting presidents have to be impeached not tried in a court. I have never heard of "Quid Pro Joe." But, Trump pushed the "No Quid Pro Quo," defense because a sing song label like that resonates with the simple minded. Extortion and Bribery are legal terms. For example, Trump bribed Stormy Daniels when he gave her $135,000 to keep silent, during the 2016 campaign, about their affair. His "Non Disclosure Agreements" that he requires of all his employees become instruments of extortion when he attempts to enforce them to cover up illegal acts witnessed by said employees, as in the Stormy Daniels case.