Politics and government 52 Communism 21 Slavery 20 History 17 Legislators 15 Compromise of 1850 9 Refugees 7 more ... Emigration and immigration 6 Education 5 Espionage, Soviet 5 Foot's resolution, 1829 5 Nullification (States' rights) 5 Subversive activities 5 Archival resources 4 Archives 4 Civil rights 4 Extension to the territories 4 Indians of North America 4 Labor unions 4 Legal status, laws, etc 4 Speeches in Congress 4 African Americans 3 Corrupt practices 3 Directories 3 Elections 3 Emancipation 3 Enslaved persons 3 Foreign relations 3 Government relations 3 Land tenure 3 Law and legislation 3 Republican 3 Sources 3 African American women legislators 2 Agricultural laborers 2 Attorneys general 2 Bibliography 2 Campaign literature 2 Centennial celebrations, etc 2 Democratic 2 less ...