With all state lawmaker seats up for election this fall, legislative leaders are signaling that the debate over offshore wind is emerging as a potential factor in who controls that branch of government over the next two years. In an unexpected move, the Democratic Senate president and Assembly speaker on Monday issued a joint statement expressing concerns about the state Board of Public Utilities’ approach on promoting offshore wind projects, citing concerns about its potential cost to utility customers and its impact on New Jersey’s lucrative tourism industry.