This new poll reveals how Americans are feeling about the U.S. as its 250th birthday approaches

As the U.S. prepares for an extravagant celebration of its founding principles, fewer Americans see their country as exceptional, a new poll finds.The survey from The Associated Press-NORC Center for Public Affairs Research highlights many Americans’ feeling of unease over the future of its representative government — particularly among young people. It presents a jarring contrast as communities around the country commemorate the nation’s 250th anniversary.Only about one-quarter of A...