Presidents 1,004 History 697 Politics and government 581 Foreign relations 166 Election 160 Railroads 101 Biography 98 more ... Slavery 87 African Americans 82 College presidents 82 Legislators 71 Generals 61 Sources 60 Sermons 52 Campaign literature 50 Vice-presidents 48 Clergy 43 Histoire 42 Presidents' spouses 42 Churches 41 Education 41 Physicians 41 Assassination 40 Indians of North America 40 Death and burial 39 Politique et gouvernement 38 Societies, etc 37 Officers 36 Republican 36 Canals 33 Elections 32 Lawyers 32 Whig 32 Faculty 30 Campaigns 29 Description and travel 29 Governors 29 Diplomatic relations 28 Presidential candidates 28 Charities 27 less ...