Polls have closed in the Massachusetts primary election, and candidates are waiting for returns to come in. Four Democrats fought for the gubernatorial nomination in the most expensive primary in the state's history, with more than $15 million spent. Two of the candidates -- Shannon O'Brien and Tom Birmingham -- were well-financed, a third -- Warren Tolman -- benefited from a court ruling, and the fourth -- Robert Reich -- ran a quirky campaign on a shoestring budget. Reich pulled an all-nighter, campaigning across Greater Boston from 7 p.m. Monday to Tuesday morning. He refused to put much of his...