 Carter worked to increase knowledge and dialogue with the countries of the Pacific Rim, but he also promoted interests and groups which critics charged were communist fronts or communist dominated.In 1948, he left the IPR under pressure and became Provost and then Director of International Studies of the New School for Social Research in New York City.Carter became a main target of the McCarran Committee as part of a general investigation of the U.S. Department of State by Senator Joseph McCarthy.