When the issue was brought up at the Potsdam Conference, the President of the United States, Harry S. Truman, said the question of the straits was a domestic political issue pertaining to Turkey and the USSR, and should be solved by the two involved parties.[15] As the argument heated up in the days proceeding Potsdam, the United States decided it firmly did not want the straits to fall into Soviet hands, as it would give them a major strategic gateway between the Black Sea and Mediterranean and possibly lead to a Communist Turkey. In a secret telegram sent by US Under Secretary of State Dean Acheson to diplomats in Paris, he explained the American position on the matter.[16]