Park was well known for her strict adherence to political promises. In 2010, for example, she successfully stopped the Lee administration's attempt to cancel the plan to establish Sejong City, a new national center of administration, arguing that the plan was a promise made to the people. This conflict between Park and the Lee Administration cost her a considerable decrease in her approval rating at the time. In 2012, Park also vowed to construct a new airport in the southeastern region, a 2008 presidential campaign promise made by GNP but cancelled in 2011, despite claims of economic infeasibility of the plan.