History 51 Presidents 18 Election 17 Contested elections 14 Politics and government 11 African Americans 9 Trials, litigation, etc 9 more ... Foreign relations 8 Social conditions 7 Race relations 6 Authors, American 5 Campaigns 5 Diplomatic relations 5 Political campaigns 5 Social aspects 5 Civil rights 4 Immigrants 4 Slavery 4 Soldiers 4 Territorial expansion 4 Colonies 3 Conservationists 3 Cuban Americans 3 Economic conditions 3 Emigration and immigration 3 Environmental degradation 3 Environmental policy 3 Feminists 3 Fugitive slaves 3 History and criticism 3 less ...