President Obama’s first official media appearance ran into a minor speed bump today when Vice President Biden was unsure whether he was supposed to swear in new White House senior staff. Biden then took a lighthearted swipe at Chief Justice Roberts, who misread the presidential oath to Obama yesterday:

BIDEN: Am I doing this again? For the senior staff. Alright.

OBAMA: A number of the other members have already —

BIDEN: My memory is not as good as Justice Roberts, Chief Justice Roberts (laughter).