WASHINGTON (Reuters) – A new poll on Monday found signs of trouble ahead for President Barack Obama and his Democrats on national security issues such as the handling of terrorism suspects. The poll was conducted jointly by Democratic Corps, a Democratic organization, and Third Way, a progressive non-profit organization. It was done mainly to gauge voters' views on Democrats' handling of national security. The poll also found weaknesses for the Democrats on other issues ahead of November elections, in which they hope to defend their strong majorities in Congress. The poll found 60 percent of Americans believe the United States...