Poll: Voters Eyeing National Security WASHINGTON - Concern about national security is dominating public attention in the final months of the presidential campaign because of continuing fears of terrorism and unhappiness about the war in Iraq, according to a poll released Wednesday.   "For the first time since the Vietnam era, national security issues are looming larger than economic issues in an election year," said Andrew Kohut, director of the Pew Research Center for the People   the Press...