More than 200 United Steelworkers union members from Maine and their supporters rallied in front of Sappi Fine Paper’s North American headquarters in Boston on Monday to promote their cause in bargaining talks with the company. Sappi security personnel reportedly refused entry to Sappi workers who were delivering petitions to North American CEO Ronee Hagen from the company’s employees at its five U.S. locations. Busloads of workers from Sappi’s Westbrook and Skowhegan plants, which are currently facing difficult negotiations with the company, led the union support rally. Local and regional labor leaders, as well as a South African labor leader who represents Sappi paper plant workers, addressed a noontime crowd.