"Trump is even talking to friends about the possibility of asking Attorney General Jeff Sessions to consider prosecuting Mueller and his team."
The strategy is then described: Trump wouldn't fire Mueller but he'd hopefully be too busy and distracted with his own defense to spend time on investigating the President.
This possible strategy is so bizarre and surreal that one is left wondering if Trump has lost his grip on reality. Apparently he doesn't realize that, while leading the criminal investigation into the President and his associates, he's only a small part of it. If Mueller is unavailable for any reason, then the investigation continues nonetheless with his many subordinates continuing to work on their aspects of the investigation.
Is Trump such a narcissist that he doesn't understand basic concepts of delegation and team work product? He thinks Manafort must be operating just like him, like some kind of imaginary princeling?
This also shows his fundamental ignorance of how American justice works. This isn't some banana republic -- people can't just be prosecuted on nonsensical fabricated charges. The law is constrained by concepts like probable cause and due process.
A man who doesn't understand legal basics is not a man who would feel bound by the rule of law. If this hairbrain scheme goes no further, Trump can't undo the damage this revelation has done.