From CNN's Rachel Streitfeld

CNN) – If Sen. Joe Biden was hurt that Republican operative Karl Rove called him a “big blowhard doofus” at an event in Minneapolis Monday, he didn’t show it.

On hearing the news, Biden grinned and said “he’s a great American.”

The blog Politicker ME reports that at a Maine delegate breakfast at the Republican National Convention, Rove, the so-called “architect” of the Bush administration, called Biden a “big blowhard doofus.”

Later, in response to a different question, Rove is reported to have asked "Is there press in this room?"

Yes, Karl, there is...