The political question doctrine is one of the controversial issues in Korea and U.S. The most important point is, however, that the current trend on political questions in Korea is in line with that of American judicial activism. In other words, both countries are trying to narrow the range of the doctrine. Nonetheless, the two are proceeding in sharply opposite directions. Fully matured, even excessively extended American judicial activism should return to the classical separation of powers doctrine. In contrast, a developing Korean judicial activism should be accelerated by the support and encouragement of the people, in support of the belief that the constitutional adjudication system is the last resort for protection of the constitutional rights of the people.