Özet:

States must exercise their sovereignty on reasonable grounds by obeying the generally accepted principles of international law. How the generally accepted principles of international law are interpreted may vary from state to state. Some legal systems such as that of the United States of America may use foreign policy as a basis for deport an alien even if the alien is not involved in any activity against the state. This study examines alien deportation in terms of state foreign policy and elaborates upon the test to be applied based on public and foreign policy by reviewing the United States Supreme Court judgments, Turkish Constitutional Court rulings, and the Turkish Council of State decisions on alien deportation. The paper discusses foreign policy as a basis for deportation in Turkish law in terms of public policy and national security and proposes practical solutions for dealing with such circumstances in future research.