Just before 9:00 last night during CNN's Republican convention coverage, CNN political analyst David Gergen asserted that the liberal establishment "doesn't exist anymore," leading Republican strategist Alex Castellanos to poke back with, "I think if David Gergen thinks the liberal establishment does not exist anymore, I think he has become a part of it."

Gergen responded to Castellanos, "First of all, is there a liberal establishment in charge of Washington? I'm sorry. There has been another party that's basically been running Washington for the last eight years. If there has been a liberal establishment, it shrunk a lot and it's not right in Washington. That's a '70s concept, Alex." 

The dust-up between Castellanos and Gergen occurred during an analysis of the 9/11 video shown last night in which Wolf Blitzer noted President George W. Bush's absence from the video and suggested the absence made the video more "political," leaving the door wide open for Gergen, who has served as an advisor to both Democratic and Republican White House administrations, to go after Republicans for their "selective memory" and to fret that the convention has "been so combative."