He insisted on full coordination with the Republican leadership. He made sure that leading Republicans were on board, especially Senators Arthur Vandenberg of Michigan,[21] and Warren Austin of Vermont.[22] In a broad sense, Roosevelt believed that the UN could solve the minor problems and provide the chief mechanism to resolve any major Issues that arose among the great powers, all of whom would have a veto. Roosevelt was especially interested in international protection of human rights, and in this area his wife played a major role as well.[23][24]