Video: Joe Biden appears mentally unstable (no, seriously)

This RNC ad highlighting Joe Biden's debate performance is not taken out of context. If you saw the debate, this is only a small sampling of his behavior. Biden appeared to be either mentally or emotionally stable, laughing and smirking throughout. On top of that, the state of both the world and our country doesn't warrant much laughing at all, especially from the vice president.

Perhaps the reason for so many gaffes might have something to do with his mental stability.

This ad from the RNC is spot-on: