Illegal immigration Noncitizens 259 Emigration and immigration 147 Government policy 104 Social conditions 45 Immigrants 40 Emigration and immigration law 38 more ... Social aspects 38 Border security 21 History 21 Legal status, laws, etc 18 Foreign workers 17 Human smuggling 16 Deportation 15 Immigration enforcement 15 Refugees 15 Border patrols 14 Border crossing 12 Mexicans 12 Noncitizen children 12 Education (Higher) 11 Human rights 11 Children of noncitizens 10 Detention of persons 10 Immigrant families 10 Economic conditions 9 Political activity 9 Citizenship 8 Civil rights 8 Economic aspects 8 less ...