A new poll finds a majority of swing-state voters saying they are not better off than they were in 2008.

A new Gallup poll released Monday shows 56 percent of registered voters in 12 key battleground states saying they are not better off than they were four years ago. Forty percent say they are better off. 

Among all registered voters in the country surveyed, 55 percent say they were not doing better after four years of Obama to 40 percent saying their situation had improved.

The poll's findings signal a trouble spot for the Obama campaign, which has sought to convince voters that the economy, the No. 1 issue for the electorate, has made gains under the administration and is recovering from its severe recession.

Fifty percent of independents, 36 percent of Democrats and 84 percent of Republicans in swing states said they were not better off compared with in 2008.

But battleground-state voters generally do not blame President Obama for their circumstances, the poll finds. Twenty percent said they were not better and blamed Obama alone, with 15 percent of those who were worse off blaming both Obama and former President George W. Bush.

Forty-six percent of swing-state voters said Obama had done as well as could be expected, with 52 percent saying he could have done more.

But voters also expressed doubts that they would fare better under a Romney administration. Forty-four percent said they expected to be better off in four years if Romney was elected, to 49 percent who believed they would not be better off. 

Those figures largely jibed with how voters believe they would do under four more years of Obama, with 42 percent saying they would be better off in 2016 to 52 saying they would not be.

Voters are still split over which candidate can best improve the economy. Forty-four percent of all swing-state registered voters surveyed said they would be better off with Romney elected, to 44 who said they would be better off if Obama were reelected.

The Gallup survey was conducted from Aug. 6 to 13 and has a 4-point margin of error. Voters in Colorado, Florida, Iowa, Michigan, Nevada, New Hampshire, New Mexico, North Carolina, Ohio, Pennsylvania, Virginia and Wisconsin were surveyed for the poll.