Stop & Shop returns to the negotiating table with its unions on Wednesday. The state treasurer of Massachusetts has criticized the company's proposals — and she has a unique perspective. State treasurer Deb Goldberg's family started, but no longer owns, Stop & Shop. Her ancestors opened the Economy Grocery Store in Somerville in 1914, and she and her family ran what became the Stop & Shop chain until the late 1980s. In a video for the 2014 state Democratic convention, Goldberg presented herself as a friend of labor. "We brought in the unions ourselves," she says in the video, "and...