Smiles were few, but there were plenty of scowls Tuesday night on the usually smug faces of MSNBC's fervently liberal show hosts. Chris Matthews hasn't looked this unhappy since his one-time boss, Tip O'Neill, passed from this mortal coil. Nora O'Donnell, network reporter and Obama enthusiast, was unable to muster even a trace of a grin throughout the evening, as it became clear that the late polling in Massachusetts' special election was accurate and that upstart Republican state senator Scott Brown was going to beat Democrat Martha Coakley and take the U.S. Senate seat held by a Kennedy for almost...