Emigration and immigration 23 Government policy 10 Security, International 7 Foreign relations 6 Politics and government 6 Immigrants 5 Democracy 4 National security 4 Political parties 4 Presidents 4 History 3 Military policy 3 Strategic aspects 3 Asians 2 Cultural pluralism 2 Economic conditions 2 Election 2 Executive power 2 Human rights 2 International cooperation 2 Political aspects 2 Political participation 2 Refugees 2 Relations 2 Social conditions 2 Solidarity 2 Welfare state 2 Acculturation 1 Administrative agencies 1 Alien detention centers 1