) -- After his combative performance on Capitol Hill last week, Treasury Secretary Timothy Geithner's tenure helming the U.S. economy has never seemed more vulnerable.


JPMorgan Chase

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CEO Jamie Dimon has already surfaced as a

candidate to replace Geithner.

The theatrics under the Capitol Dome and attacks from the right on Obama's economic team, led by Texas congressman Ron Paul, could just be the usual Washington D.C. grandstanding for populist support. Or is the tide really turning against an already-embattled Geithner?

President Obama has proven to harbor few qualms when it comes to axing major staff members as a way to feed a rabid public -- recent White House council Gregory Craig reportedly got his walking papers as a result of his mishandling of Guantanamo Bay. Thus, if Geithner is soon to join the 10% of the U.S. work force on the rolls of unemployment, who would make the best new Treasury Secretary?

-- Reported by Eric Rosenbaum in New York.

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