From a Hillary Clinton fundraising email:
Look, I don't care that James Carville is supporting Hillary Clinton, but given his role as one of CNN's resident pundits, over the next year or so with the primary season with us it's a bit problematic for him to be involved in discussions of the primary. He was on yesterday discussing the Clinton/Obama issue only identified as a "political strategist" and "CNN contributor."
Anyway, this kind of complaint isn't limited to Carville, he's just a more visible one with more obvious connections.
(thanks to reader d)