"Biden just keeps laughing."
I think he's a little rattled.
Keeps complaining that he doesn't have any time.
Keeps asking questions, doesn't let Roberts answer, says that he doesn't need to hear all of Roberts' answer, says that he already understands Roberts' answer.
Basically, he DOESN'T CARE what the answer is. He, in his big brain, has already came to the correct conclusions.
HE IS SO CONDESCENDING! I would HATE to be on his staff.