-—“Constitutionally, Obama can’t return to the White House at all”
I thought the rule is no more than two consecutive terms.-—0
Once you’ve served two full elected terms, that’s it.
It MIGHT be possible to backdoor a former president into the whitehouse by having him serve in the House and then he elected Speaker before impeaching the President and Vice President. The 22 amendment only states that a person cannot be ELECTED more than twice. Assuming that the idea was to switch parties in the White House you’d have to impeach both at the same time, since the VP would move up the ladder like Ford did when Nixon resigned.
It’s a long shot at best.