VOTERS famously have short memories. Despite their reputation as a sober, well-governed lot, Chileans are no exception. Just six months ago Sebastián Piñera (pictured), the president, was riding high after the miraculous rescue of 33 miners who had been trapped underground for ten weeks. According to Adimark, a pollster, his approval rating reached 63% following the successful operation. The company’s June survey painted a far grimmer picture for Mr Piñera: his support has dropped to just 36%, the lowest figure since he took office in March 2010. Meanwhile, his disapproval rating hit 56%, the highest mark for any Chilean president since the return of democracy in 1990.