Views of the candidates
In spite of the nation's largely negative views on the economy, Mr. Obama's supporters are more enthusiastic at this point in the race than Romney's.
As many as 59 percent of the voters who back the president say they enthusiastically support him - far larger than the share of Romney's supporters who say the same (35 percent). A third of the voters who back Romney say they support him with reservations, but 22 percent back him because they dislike the president.
Heading into the parties' conventions, Mr. Obama and Romney are in a tight race among registered voters who lean towards a candidate; Mr. Obama leads by just one point, 46 percent to 45 percent.
There is some room for movement in the race - but not much. About four in five voters say they have made up their minds which candidate to support, but for about one in 10 the race is not yet over, as they say it's too early and their minds could still change. Similar percentages of Obama and Romney voters could change their minds.
Democrats are satisfied, but more apt to be just somewhat satisfied (53 percent) than very satisfied (29 percent). Another 18 percent of Democrats are disappointed. Most independents (58 percent) are disappointed. Republicans, perhaps unsurprisingly, are very much so.
While most voters who are disappointed with the Obama presidency are not supporting Mr. Obama this fall, 14 percent still plan to vote for him.
Mr. Obama's job approval rating among all Americans is now more positive than negative; 48 percent approve - a four-point increase from July but about where it was in April - and 43 percent disapprove.
Americans have consistently said the economy is the top issue facing the country. On this, the president continues to receive low marks; a majority (54 percent) disapproves of his performance on it, unchanged from July.
Most voters, 52 percent, believe Romney would do a better job handling the economy and jobs, though Mr. Obama is seen as the candidate who would do a better job helping the middle class (he wins 50 percent to Romney's 42 percent).
Voters also think Mr. Obama would do a better job on social issues like abortion and same-sex marriage. The president has small edge over Romney on the issue of terrorism and national security, but they are about even on the issue of Medicare (45 percent say Mr. Obama would be better; 44 percent say Romney).
While Romney may be seen as the candidate who would do a better job on the economy, fewer than half of voters think either candidate has a clear plan for creating jobs. Just 43 percent think Romney has a plan, but even fewer, 35 percent, think Mr. Obama does.
For the full poll results, see next two pages.