Original sentence: After 2001, some congressional leaders and others criticized him, for certain statements they found to overstep the Fed's traditional purview of monetary policy, and for other statements they saw as overly supportive of the policies of President George W.All considered, during his tenure Greenspan was the leading authority on American domestic economic and monetary policy, and his active influence continues.Greenspan has denied blame for the crisis.In 2004 Business Week Magazine criticized his keeping of low interest levels too long and his concurrent praise of sub-prime lending vehicles such as ARMs as leading to a housing bubble.Some, including Nobel Prize-winning economists Joseph E.Stiglitz and Paul Krugman, attribute a large degree of culpability for the devastating late 2000s recession to Greenspan.This expansion eventually ended in a burst in March 2000 leading to an economic downturn
Edited sentence: During his tenure Greenspan was the leading authority on American domestic economic and monetary policy, and his active influence continues