I'd hate to give the impression that only Republicans have internal animus. MyDD points
to this incident
, in which New Jersey's Senator Corzine (and governor-elect) said of New York's Chuck Schumer:
"Sharing a media market with Chuck Schumer is like sharing a banana with a monkey," Corzine lamented. "Take a little bite out of it and he will throw his own feces at you."
Corzine, who said he meant this facetiously, would later apologize.
I pass that on because of my New York/New Jersey roots, and because it made me laugh out loud when I read it.