There has never been a primary contest reversed after the fact in American history. Until now. Twice. Maybe. We’ll see. Here’s Rachel Maddow (in two parts):
Part 1:
Part 2:
Here’s the Maine results as reported by Google as of this writing:

I’ll repost that if it changes.
Florida 2004 where Bush won over Al Gore but maybe didn’t?
Oh wait, we’re talking nominating for presidency not the actual thing. Never mind.