So yes, it can happen.
Longtime investigative journalist and best-selling author Ed Klein explained on Fox and Friends Weekend this morning.
From Fox News Insider:
Klein said one of the allegations of pay-for-play against the Clinton Foundation revolves around the aftermath of the 2010 Haiti earthquake.
"There's a very good chance that if [Clinton] is elected president...by the time inauguration comes around, [FBI Director James] Comey will have recommended an indictment of the president-to-be. [It would be a] Constitutional crisis of enormous proportions."
If that were to happen, Klein said, it remains to be seen whether then-Vice President Timothy Kaine will take the top job or if first gentleman Bill Clinton will work "behind the scenes" as Edith Bolling Galt Wilson did for President Woodrow Wilson.