He thought it's hanging upside down and asked that it be righted.
Gibbs was told it is rightside up - it's a reflection in a table top of members of the press in the Oval Office
He still says it makes him dizzy every time he walks by it.
Coming off the candidates' first time sharing the stage at Hofstra University in New York Monday, here's CBS News' guide to the accuracy of the candidates' statements
Was Monday's debate the moment that finally finished Trump? Don't be so sure