Second, punctuated equilibrium recognizes that changes in institutional design occur following the emergence of an issue on the government agenda, moving policy scholars away from the Downs(1972) model of negative policy feedback. This has important implications for policy entrepreneurs. The key to disrupting policy equilibrium is finding the appropriate policy image that mobilizes citizens previously disengaged from the political process. No one group controls the policy process, and no one issue fits neatly into a particular venue. lmmigration policy, for example, is both a national security issue as well as an economic development issue. Policy entrepreneurs, utilizing the media and other political actors, can continually redefine their policy image until it receives receptive audience, setting the stage for rapid policy change.