By Laura A. BischoffDayton Daily NewsThe presidential race in Ohio remains a volatile contest that could break either way depending on how undecided voters and those supporting third-party candidates make their final decisions, a new survey shows.Democrat Hillary Clinton leads by 3 percentage points over Republican Donald Trump in the poll, which the University of Akron conducted for the Akron Beacon Journal, WKSU public radio, the The Repository of Canton and other Ohio news organizations.Clinton’s lead is hardly safe: More than one in five Ohio voters — 21 percent — say they are undecided or plan to vote for either Libertarian Gary Johnson or Green Party candidate Jill Stein.