A long-time supporter of the United Nations, McGee was appointed by President Richard Nixon to a four-member congressional delegation to represent the United States at the United Nations' 27th General Assembly in 1972. His chief assignment at the Assembly was to get the United Nations members to agree to lower the U.S.'s share annual dues from 31 percent to 25 percent - a difference of $13 million. Both the House and Senate had already passed measures to limit the United States' contribution to the U.N. But each country's share is ultimately decided by a majority of the 130 member nations. Through the efforts of McGee, along with U.S. Ambassador to the U.N. George Bush, the U.N. assembly approved the reduction, with 80 nations voting to support the resolution.