Well our illustrious Potus had to resort to Plan "B" 11 days prior to the November 2016 election. Why...? Well, it was looking like Donald J Trump might actually have a chance to win and since President Obama wanted to leave nothing to chance, he changed from Plan "A" to Plan "B".
What was Plan "A" you might ask? That was to wait until the election had finished and having Kill...err...Hillary Clinton win and prior to being sworn in, Loretta Lynch (via commands from above) would order James Comey of the FBI to recommend indictment on the Clinton Foundation investigation. Mr. Obama did not want to be implicated in the email scandal but he did want to leave the woman unable to perform duties as President of the US thereby giving him the opportunity to serve a third term in spite of the Constitutional ban on such a situation.
Mr. Trump was seen tightening the race. With Wikileaks adding negative reporting on the Clintons thereby weakening her attempt to win while simultaneously increasing his odds for presidential election. Enter Plan "B"...which was timed to occur too close to the election date for the Democrats to be able offer an alternative candidate (Perhaps Pocahontas, I mean Lizzie Warren?). Additionally, early votes had already been cast for Ms. Clinton leaving those votes lost to the Democratic Party. The election would proceed as scheduled and before the winner, no matter who that may be, could be sworn in; The president would declare martial law (if needed) and void the election results stating, if Hillary wins, she would not be able serve due to her indictment. Therefore. being the active Potus, he'd have to serve her term or the country would be left without a leader ignoring the Constitutional Progression which would leave a Republican as Potus (the Speaker of the House Paul Ryan). If The Donald won he would still proclaim the election results null and void due to an unfair election edge that was provided to the GOP candidate by the FBI reopening her email investigation so close the Election Date. He would have his lawyers pronounce this action, caused by Congressional Republican pressure on the FBI director, an Unconstitutional effort to influence the election outcome. The result would be the same as Plan "A". To be able to save himself from testifying in the email scandal, he would probably cite Executive privilege.
The only loser in this election will be the American People.