I assumed from the beginning of last week’s debate that Joe Biden’s laughing, smirking, cackling, and sneering was not an unfortunate manifestation of his personality in the way Al Gore’s sighs were. It seemed clear to me that this was a deliberate tactic.

Laugh at Ryan throughout, relentlessly, and cut him off and ridicule him. I suspect Biden was told to do this, and that he spent a week practicing it. The reasons to do this could include:

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