 Though Hoover had opposed Roosevelt's concentration of power in the 1930s, he believed that a stronger presidency was required with the advent of the Atomic Age.During the 1948 presidential election, Hoover supported Republican nominee Thomas Dewey's unsuccessful campaign against Truman, but he remained on good terms with Truman.Hoover favored the United Nations in principle, but he opposed granting membership to the Soviet Union and other Communist states.