Most Americans think nation’s best days are over, says new poll to mark 250th anniversary

Most Americans think the U.S. has already seen its best days, according to a new poll released ahead of the country’s 250th anniversary.

Fifty-eight percent of adults across different states and political backgrounds say the country’s best years are in the past, whereas 38 percent are positive that there are better years to come, according to a new NBC News poll of 3,000 U.S. adults.