You’re missing my point. No one is officially investigating that angle though. Until someone actually starts an investigation into the real crimes here—no need to recuse himself. He just needs to play along until real evidence is found that suggests that he was illegally wire tapped. Then he can recuse himself. Until then it’s just crazy talk (according to the liberals).
So if the liberals say he needs to recuse, his response is why, are you suggesting the wire taps did occur and were illegal?
"Officially" is a loaded term, since the FBI doesn't make public announcements about these things. If anything, I would take Sessions' recusal as an indirect admission that there WAS an investigation underway.
Heck -- I've suspected that Rudy Giuliani was nowhere to be found among the senior cabinet appointments in the new administration, and has almost completely disappeared from public view since January, because of the likelihood that his own security consulting firm had been retained by the Trump transition to team to investigate the matter on their own.