Foreign relations -- Politics and government -- 28 National security -- 18 Foreign economic relations -- 13 Congresses -- 11 History -- 8 Economic integration 7 more ... Foreign relations 7 Relations -- 7 Security, International 7 Congresses 6 International relations 6 World politics -- 6 Politics and government 4 History 3 North Atlantic Treaty Organization 3 Regionalism -- 3 Communism and international relations 2 Congress. -- 2 Decision making 2 Defenses -- 2 Economic conditions 2 Economic conditions -- 2 Europe -- 2 European cooperation 2 European economic community -- 2 Foreign economic relations 2 Foreign policy 2 International law -- 2 Islam 2 less ...