Politics and government -- 33 Foreign relations -- 13 Economic integration 7 Congresses 6 Congresses -- 6 History -- 5 Politics and government 5 more ... Defenses 4 Economic conditions -- 4 World politics -- 4 Emigration and immigration -- 3 Military policy 3 National security -- 3 Citizenship -- 2 Cold War 2 Commerce -- 2 Defenses -- 2 Democracy -- 2 Economic policy 2 Ethnic relations 2 Ethnicity -- 2 European Economic Community countries -- 2 Foreign economic relations -- 2 Foreign relations 2 Government policy 2 Minorities -- 2 Naturalization -- 2 Political parties -- 2 Social conditions -- 2 Aliens -- 1 less ...