The Hill: White House spokesman Jay Carney ended a testy exchange with a reporter on Air Force One Wednesday by routing questions about review of the Keystone XL oil sands pipeline to the State Department.
Along the way, Carney and the reporter sparred over the definition of hypothetical.
Carney played defense when fielding a question about, among other things, whether Friday's spill of Canadian oil from an Exxon pipeline in Arkansas will affect the White House decision on Keystone XL.
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