Bernie Sanders and Pete Buttigieg led the pack in New Hampshire. Two candidates have exited the race, and a potential spoiler is yet to compete. Argentina’s administration is at risk of defaulting on its gargantuan debt to the International Monetary Fund; both will be hoping to end the standoff today. And the environmentally conscious quest for artificial shrimp. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/radiooffer