This weekend is the biggest socio-political event of the year in DC. Socializing and politics always go hand in hand here, but this weekend is different. The White House Correspondents' Association annual dinner Saturday night has morphed into a creature all its own, an amalgam of DC, NY and Hollywood elites that has come to dominate the calendar of the Federal City (as distinguished from the non-governmental and more down-to-earth Washington). I'm not sure there's anything else that captures so completely the way the modern DC operates and conceives of itself as this weekend does. A glimpse of WHCA dinners past