WASHINGTON (Reuters) - The economy faces even more difficult times  ahead with chronic unemployment and slow manufacturing hurting the  recovery, the head of Congress' budget agency said on Thursday.
The  warning from the non-partisan Congressional Budget Office came on top  of more bad economic data that heightened concerns about a return to  recession and sent markets roiling. It could also spell trouble for  Democrats facing November elections.
The CBO forecast the U.S.  budget deficit will hit $1.342 trillion this year, down slightly from  its March projection of $1.368 trillion.
It attributed most of the  $27 billion change in its fiscal 2010 deficit projection to an  estimated $50 billion reduction in the cost of TARP, the U.S.  government's bailout of financial institutions in 2009.
But the  figures show that without significant changes in U.S. tax and spending  laws, the government will struggle to dig its way out of a deep fiscal  deficit hole.
Congressional Budget Office Director Douglas  Elmendorf painted a picture of a tough recovery from recession, although  the CBO predicted a 3 percent economic growth rate this year.
"The  considerable number of vacant houses and underused factories and  offices will be a continuing drag on residential construction and  business investment, and slow income growth as well as lost wealth will  restrain consumer spending," he said.
The unemployment rate will  not fall to around 5 percent until 2014, Elmendorf said. The last time  the jobless rate was 5 percent was April 2008, just as the economy was  heading into recession and unemployment was on the rise.
BAD FOR DEMOCRATS
Anxiety  over the economy is likely to punish President Barack Obama's Democrats  at November's midterm elections because of perceptions of big deficits  caused by government spending and high unemployment.
Republican Senator Judd Gregg warned of fiscal calamity.
"Today's  CBO outlook only underscores what we already know -- the current pace  of U.S. spending is unaffordable and unsustainable and without a change  in direction this country is headed for fiscal calamity," said Gregg,  the senior Republican on the Senate Budget Committee.
As if to  illustrate the severity of the economic challenge ahead, the CBO  forecast was released as new data dealt another blow to the fragile U.S.  economy, driving prices on U.S. government debt higher and yields  lower.
The benchmark 10-year Treasury note yield fell to a 17-month low of 2.56 percent this week.
Concerns  about the massive deficit, and the U.S. triple-A credit rating, are not  expected to lift Treasury debt yields from current low levels any time  soon.
"We think bond yields are going lower, mostly on revised  growth expectations -- all the shops are revising down their forecasts  for inflation and growth," said Sergey Bondarchuk, U.S. interest rate  strategist with BNP Paribas in New York.
CHRONIC UNEMPLOYMENT
The  budget and economic outlook are designed to give lawmakers the most  up-to-date nonpartisan assessment of U.S. economic health and provide  the latest projections on deficits that began in 2002 under former  President George W. Bush and then skyrocketed in 2009 during recession  and stimulus spending under Obama.
The CBO's deficit numbers are  slightly lower than recent White House predictions for the fiscal gap,  but the two use different measurements.
Members of Congress will rely on the CBO numbers as they decide how to tackle the yawning budget gap.
The  CBO projected a 9.5 percent jobless rate for this year, falling only  slightly to 9 percent in 2011 and averaging 6.7 percent in 2012-2014,  significantly shy of the 4 percent target economists would consider a  full employment level.
Last month, the White House said  unemployment will decline slowly, to 8.1 percent in 2012, when the U.S.  presidential election will be held.
Democrats blame Bush for the  budget deficit and say Republicans are blocking efforts in Congress to  fight unemployment and help small business.
"Republicans bear much  of the responsibility for wiping out the surpluses they inherited in  2001 and creating these deficits," said Thomas Kahn, Democratic staff  director of the House of Representatives' Budget Committee.
"And  what's their solution now? Almost $4 trillion dollars in new tax cuts  largely benefiting the most privileged. That would just dig the deficit  hole even deeper," Kahn added, referring to Republican tax cut plans.
An  independent, bipartisan commission is studying possible fixes to the  budget and economic dilemma but is not due to report to Obama until  December.
CBO also forecast a $1.066 trillion deficit for fiscal  year 2011, which begins on October 1, up slightly from the March  estimate of $996 billion.
The U.S. budget deficit last year was a record $1.413 trillion, 9.9 percent of gross domestic product.