WASHINGTON (AP) - The government's economic stimulus spending has already had its biggest impact and probably will not contribute to significant growth next year, a top White House adviser said Thursday.
The adviser, Christina D. Romer, the chairwoman of President Obama's Council of Economic Advisers, said the initial jolt of the $787 billion stimulus expanded the economy in the second and third quarters of this year. But she said the remaining spending will simply keep the economy from slipping.

"By mid-2010," she said, "fiscal stimulus will likely be contributing little to further growth."
That assessment underscored the fragility of an economic recovery marked by stubbornly high unemployment.

Ms. Romer said the government has already spent $194 billion of the total stimulus package, most of it in tax cuts, aid to states and unemployment and food stamps.

Testifying before Congress' Joint Economic Committee, Ms. Romer said that as of August the stimulus had created or saved 600,000 to 1.5 million jobs. She said a premature end to the stimulus would be "misguided."

Unemployment will remain high, at or above 9.6 percent, through the end of 2010, Ms. Romer predicted.

"While job losses will likely end early next year, robust job gains may still be several quarters away," she said.

The pace of the recovery and the unyielding jobless numbers pose significant political and policy problems for the president and for Congressional Democrats who face midterm elections next year.

The administration and Congress are confronting competing demands to spend more money to create additional jobs and a desire to confront rising deficits and a burgeoning national debt.

Republicans were skeptical of Ms. Romer's claims of stimulus success.

"The impacts of the stimulus are wildly exaggerated," said Representative Kevin Brady, a Texas Republican.

Senator Sam Brownback, a Republican from Kansas, said the administration's push for health care and climate change legislation have also created uncertainty among employers who worry about tax increases and are thus unwilling to take risks that could create jobs.

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