This November, Massachusetts voters may be asked to approve a state income tax cut from 5% to 4%. Supporters say the tax cut would give the state a competitive edge, boost the economy and improve affordability. But opponents, including four New Bedford lawmakers, argue it could put public programs at risk and threaten an already strained state budget. The question has put business leaders at odds with union leaders and the state Legislature. House Speaker Ron Mariano has said that raising other