Interesting theory TB. I have a few remarks however.

1. Michael was no idiot. If he understood that Geary didn't help him as much as he could, the photos of the Senator with the dead prostitute would make headlines the next day, whether Michael was indicted for perjury or not.

2. Geary could have been thinking with his dick but, after the Carson City incident, he had learned his lesson. I find it more likely for Geary to be thinking about his career than about planning his revenge since then.