Stephen Colbert at the White House

I continue to wonder whether Stephen Colbert's legendary (and controversial) performance at the White House Correspondents Association dinner in April, 2006 will one day be seen as the tidal turning point for public opinion of the Bush presidency, much as Joseph Welch's resounding "Have you no sense of decency, sir?" retort demarcated the beginning of the end for Joseph McCarthy.

FWIW, here's a previous Slog reference to Colbert's performance.