Labor unions 13 Communism 12 World War, 1939-1945 10 Foreign relations 6 Socialism 5 History 4 Capitalism 3 more ... Labor and laboring classes 3 World politics 3 Communist 2 Economic assistance, American 2 Iron and steel workers 2 Politics and government 2 Social conditions 2 African Americans 1 Campaign literature, 1932 1 Campaign literature, 1940 1 Campaign literature, 1948 1 Civil rights 1 Coal miners 1 Economic conditions 1 Imperialism 1 Labor unions and communism 1 Manpower 1 Progressive 1 Reconstruction (1939-1951) 1 Slums 1 Soviet Union 1 Steel industry 1 Strikes and lockouts 1 United States 1 less ...