Conservatives, resisting big government outlays on principle, begin to build the case for other options.
Defense officials say it will fill urgent gaps but Special Forces officers are skeptical.
But critics say the US should go slowly on a deal that would help a crucial trading partner for Iran.
As US forces pull back, Iran is expected to widen its influence in Iraq, despite the two countries' history of war and mistrust.
Monday's attack came amid discussion of doubling the US forces in Afghanistan by mid-2009.
His team looks ready to spend at least $675 billion on projects to jolt the US economy.
Loose fiscal policy is said to doom democracies to despotism.