I see by googling it up that this phrase is ubiquitous, but I saw it the first time just this week in an email chain.
The following is the 2007 winning entry from an annual contest at Texas A&M University calling for the most appropriate definition of a contemporary term. This year a definition required for the contemporary term, 'Political Correctness'.
The winner wrote:
"Political Correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."