Look, I don't think he intends to stay in office by force, marshal law or what have you, but I also think he's VERY involved in this election if for nothing else but to pad his "Legacy" by getting someone into office to carry on his policy (I.E. Hillary Clinton).
Ah yes, I also live in the fantasy land where Reagan clearly showed no thought to his "legacy" when he endorsed Bush Sr. for president, Bill clearly showed no thought to his "legacy" when he endorsed Gore, and Bush Sr. never endorsed Jr. or Jeb.
I also don't expect he will go quietly back to Home in January 2017 and spend the rest of his days relaxing and building his library like past presidents, this guy is going to have his fingers in politics
So I guess this is also the fantasy land where Carter and Clinton didn't go on stumping for years after their presidencies ended and Bush Sr. didn't handpick half of his son's cabinet.