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Republicans have been pushing for action on all three agreements, which were approved during the administration of George W. Bush but have stalled because of Democratic opposition.

Mr. Geithner also told the panel that Congress needs to work with the White House to reform the country’s tax code. For starters, he has proposed cutting the corporate tax rate to the high 20 percent range, down from the current 35 percent.

He added that it was possible to reform the corporate tax code before updating individual tax laws.

Across the Capitol, Mrs. Sebelius defended the administration’s 2010 health care reform law before the House Ways and Means Committee.

Committee Chairman Dave Camp called the law “a mess” and said the president’s budget fails to adequately address the law’s programs.

“As I look through this budget, I see budget gimmick after budget gimmick,” the Michigan Republican said.

Mrs. Sebelius pushed back at GOP accusations that the reforms are a government takeover of health care, saying “nothing could be further from the truth.”

Ms. Solis, while testifying before the House Education and the Workforce Committee, said she doesn’t have the authority to administer parts of the Employee Free Choice Act, the so called “card check” measure that would allow unions to form after getting a majority of employees to sign a card or petition.

Legislation supporting card-check labor elections failed in the last Congress, but some Republicans have worried that the administration might try to legalize it by other means.

Committee Chairman John Kline, Minnesota Republican, told Ms. Solis that the administration has adopted several work-force policies that he said threaten job creation and economic opportunity because they “favor big labor at the expense of small businesses.”

On Capitol Hill, CIA Director Leon E. Panetta — an Obama appointee but not a Cabinet member — told a Senate panel that al-Qaeda leaders Osama bin Laden and Ayman al-Zawahri will be sent to the military prison at U.S. Naval Base Guantanamo Bay, Cuba, if they’re caught by U.S. forces.

His comments suggest the president wouldn’t try the men in the U.S. civilian court system, a Bush-era position that Mr. Obama long has criticized.

White House press secretary Jay Carney said the president remained committed to closing the detention center.

This article is based in part on wire service reports.