<i>WASHINGTON </i>— President Barack Obama and congressional Democratic leaders sought to reset their agenda as they lost their 60th vote in the Senate on Thursday, trying to push ahead with measures to spur job creation even as they grasped for ideas to keep alive their health care legislation.

Republicans on Monday blocked Senate debate on a bipartisan resolution opposing President Bush’s troop buildup in Iraq, leaving in doubt whether the Senate would render a judgment on what lawmakers of both parties described as the paramount issue of the day.