The United States has a long history offering studies in international relations and public policy, with many heads of state and heads of government graduating from American schools. Prominent alumni of school of international relations in the U.S. include Bill Clinton, former President of the United States; Gloria Macapagal Arroyo, former President of the Philippines; Abdullah II ibn al-Hussein, the King of Jordan; Felipe VI, the King of Spain (Georgetown / SFS); Felipe Calderón; former President of Mexico; Juan Manuel Santos, former President of Colombia; Lee Hsien Loong, former Prime Minister of Singapore (Harvard / HKS); Kyriakos Mitsotakis, Prime Minister of Greece (Stanford / FSI); Pedro Pablo Kuczynski, former President of Peru (Princeton / SPIA), and Geir H. Haarde, former Prime Minister of Iceland (Johns Hopkins / SAIS). Today, 17 out of the world's top 20 schools of international relations are based in the United States.