This chapter investigates leadership in foreign and security policy and European Union (EU) affairs, examining decision-making and division of labor between the president and the prime minister. In order to grasp the complexity of intra-executive policy coordination in these areas, it highlights the interdependence between foreign and EU policies. The chapter shows that intra-executive coordination is most developed in foreign and security policy and that Finland, Lithuania, and Romania normally manage to speak with one voice in external relations. It also provides evidence of constitutional rules about jurisdictions bending in favor of presidents. This applies particularly to representation in the European Council.