Barack Obama actually said...

"As President, I am just thrilled to welcome you, teachers and mentors, to the White House, because I believe so strongly in the work that you do."

"I take responsibility and that he would publicly take responsibility."

"It will be televised on C-Span. I can guarantee you it will be exciting."

"It will be televised on C-SPAN. I can't guarantee you it will be exciting."