Montenegro's veteran ruling party was leading by a hair over the pro-Serb opposition, a preliminary exit poll indicatedSunday. The pro-West Democratic Party of Socialists (DPS), who have been in power for some three decades, were in line for 34.7 percent of the vote, followed by the opposition "For the Future of Montenegro" coalition with 33.1 percent, according to a poll by election monitor CeMI based on 70 percent of its sample. mbs/ssm/jj