Four out of 5 U.S. adults struggle with joblessness, near poverty or reliance on welfare for at least parts of their lives, a sign of deteriorating economic security and an elusive American dream.

Survey data exclusive to The Associated Press points to an increasingly globalized U.S. economy, the widening gap between rich and poor and loss of good-paying manufacturing jobs as reasons for the trend.

The findings come as President Barack Obama tries to renew his administration's emphasis on the economy, saying in recent speeches that his highest priority is to "rebuild ladders of opportunity" and reverse income inequality.

Hardship is particularly on the rise among whites, based on several measures. Pessimism among that racial group about their families' economic futures has climbed to the highest point since at least 1987. In the most recent AP-GfK poll, 63 percent of whites called the economy "poor."

"I think it's going to get worse," said Irene Salyers, 52, of Buchanan County, Va., a declining coal region in Appalachia. Married and divorced three times, Salyers now helps run a fruit and vegetable stand with her boyfriend, but it doesn't generate much income. They live mostly off government disability checks.

"If you do try to go apply for a job, they're not hiring people, and they're not paying that much to even go to work," she said. Children, she said, have "nothing better to do than to get on drugs."

While racial and ethnic minorities are more likely to live in poverty, race disparities in the poverty rate have narrowed substantially since the 1970s, census data show. Economic insecurity among whites also is more pervasive than is shown in government data, engulfing more than 76 percent of white adults by the time they turn 60, according to a new economic gauge being published next year by the Oxford University Press.

The gauge defines "economic insecurity" as experiencing unemployment at some point in their working lives, or a year or more of reliance on government aid such as food stamps or income below 150 percent of the poverty line. Measured across all races, the risk of economic insecurity rises to 79 percent.