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Barack Obama is determined to fundamentally reform America's inefficient and vastly expensive healthcare system. On the face of it he has the mandate and the Congressional votes to - in his words - 'get it done now'. Why then has his drive for reform lost much of its momentum?

David Cutler was a key healthcare adviser to Obama during his presidential campaign. Is this the President's first big test and is he in danger of flunking it? David Cutler talks to Stephen Sackur.