I also think that Putin is, potentially, the mystery force that stopped Trump but there was no strong logic for that. This is bizarre enough it is hard not to look for reasons.
But, as Trump’s mental condition deteriorates, finding reasons for his actions is chasing the white rabbit. That’s what causes so much confusion. We assume anyone acting as president will have plans and goals but Trump has none. Holding on to power for all the money he can steal is it.
It’s all purely impulse based on who he is listening to at any time. He seems, now, unable to even visualize anything and has been unable to plan anything for many years.
This is why he and everyone around him needs to be stopped now. His actions are being controlled by whomever he last listened to. Hannity, Pompeo and Bolton are doing this but their orders are illogical and contradictory but he goes with the last thing he heard. Confusion reigns.