President Obama got in some trouble for saying this. But it's true. Robert Wright at The Atlantic explains. Here is a graph from his article.
Wright speculates:
"What if Obama, rather than just try to walk back his unfortunate choice of words, trotted out some visual aids and spent 60 seconds explaining exactly what he meant? 'Professorial' can be a feature, not a bug."
Haha. Obama's having got defensive and backed down on this issue really does seem like a mistake, to me.