London CNN  —  Poland is selling up to 1,000 metric tons (1,102 tons) of its frozen butter reserves to bring down surging prices ahead of presidential elections in May. The government’s strategic reserves agency announced the butter auction Tuesday, citing significant increases in butter prices worldwide that it blamed on a shortage of milk. “This emergency action… should contribute to stabilizing butter prices in the market,” the agency said, according to a report by CNN affiliate TVN24 , a