You would think Joe Biden would be able to stay 'gaffe-free' during his victory speech on Super Tuesday. That's what you'd think. But you'd be wrong.
Nope, he couldn't manage to simply not make a mistake during the speech. And he might have gotten himself into some trouble with his wife, Jill.
You see, it's never a good thing to confuse your wife with your sister. It's even worse when they are both standing next to you.
It was just the latest in the series of classic blunders Biden has made on the campaign trail over the last few days; a list that includes forgetting the words to the Declaration of Independence, and not knowing what day Super Tuesday was.
We've got all the videos below.