Politics and government -- 30 Economic integration 26 Foreign relations -- 16 Congresses 11 Congresses -- 9 Economic policy 9 Economic integration -- 7 more ... Foreign economic relations -- 7 Economic conditions -- 6 History -- 6 Politics and government 6 Defenses 4 Economic conditions 4 Military policy 4 Commerce -- 3 Emigration and immigration -- 3 European Economic Community countries -- 3 Foreign relations 3 Monetary policy -- 3 National security -- 3 World politics -- 3 Arms control -- 2 Citizenship -- 2 Commerce 2 Defenses -- 2 Democracy -- 2 Economic history -- 2 Economic policy -- 2 Ethnic relations 2 Ethnicity -- 2 less ...