PITTSBURGH, PA- Minutes stretched on awkwardly after Labor Secretary Hilda Solis spoke to local Democrats. Yet that was less uncomfortable than one man’s attempt to break the silence. “Let’s go Obama!” he shouted, clapping loudly. No response. It was a reaction you’d expect at a Republican rally – not from Pittsburgh unionists, elected Democrats and other party faithful gathered to support Barack Obama’s jobs bill. While the event’s lackluster attendance might be attributed to poor planning (cardinal rule in politics: never book a room you can’t fill – and this room wasn’t full), there is no excuse for Democrats’ lack...