A year into his presidency, Barack Obama faces a polarized nation and souring public assessments of his efforts to change Washington, according to a Washington Post-ABC News poll.

Nearly half of the Americans surveyed said Obama is not delivering on his major campaign promises, and a narrow majority had some or no confidence that he will make the right decisions for the country’s future.

More than a third saw the president as falling short of their expectations, about double the proportion saying so at the 100-day mark of Obama's presidency in April. At the time, 63 percent said the new president had accomplished a "great deal" or a "good amount. The percentage saying so in the recent poll dropped to 47 percent.