To those who might see the President's words in later broadcasts, watch what he does immediately after he says "...I nominated John Bolton"
I think it was quite aggressive body language that "tells" what he was really thinking about the obstruction that his nominee has encountered, as he started his remarks.
Our local anti-Bush rag in Baltimore will probably use a shot of that instant to illustrate their article about this event.
Loved that he talked about Bolton's experience and integrity too.