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.

Republicans were particularly critical of Obama’s efforts in general and on big domestic and foreign issues specifically. Just 20 percent of Republicans approved of his job performance, compared with 87 percent of Democrats. That partisan gap is bigger than any that former presidents Bill Clinton, George H.W. Bush, or Ronald Reagan faced among the general public. It is about on par with divergent ratings of George W. Bush across his second term.