Robert Samuelson has a Washington Post column describing President Obama's rejection of the Keystone XL pipeline as "an act of national insanity." He writes: "Stopping the pipeline won't halt the development of tar sands, to which the Canadian government is committed; therefore, there will be little effect on global-warming emissions. Indeed, Obama's decision might add to them. If Canada builds a pipeline from Alberta to the Pacific for export to Asia, moving all that oil across the ocean by tanker will create extra emissions. There will also be the risk of added spills."