 After assurances of legality on Allende's part, the murder of the Army Commander-in-Chief, General René Schneider and Frei's refusal to form an alliance with Alessandri to oppose Allende – on the grounds that the Christian Democrats were a workers' party and could not make common cause with the oligarchs – Allende was chosen by a vote of 153 to 35.The Popular Unity platform included the nationalization of U.S. interests in Chile's major copper mines, the advancement of workers' rights, deepening of the Chilean land reform, reorganization of the national economy into socialized, mixed, and private sectors, a foreign policy of "international solidarity" and national independence and a new institutional order (the "people's state" or "poder popular"), including the institution of a unicameral congress.Immediately after the election, the United States expressed its disapproval and raised a number of economic sanctions against Chile.