ONE OF THE MOST critical issues in Argentina's recent political history concerns source of popular support for Juan Per6n. His followers ardently maintain that El Lfder won devotion from the common people; detractors insist that he hoodwinked and exploited gullible illiterates. Historical and sociological interpretations have emphasized Peron's connection with the urban working class and displaced migrants, but these observations raise as many questions as they answer.' What sort of urban community, working class, or migration? How about other social sectors? What happened in rural areas? Voting returns from 1946 presidential election offer one promising means for attacking such problems. It was this election, of course, which marked beginning of Peron's decade-long dictatorship. Starting his climb to national prominence in 1943, Peron launched his impossible candidacy in late 1945 and overcame combined opposition of all former national political parties-plus indiscreet resistance of U.S. State Department-to win a solid 54 percent majority. Most commentaries upon this extraordinary achievement have derived from eyewitness accounts, partisan state* author is Associate Professor of History at University of Wisconsin, and would like to thank Graduate School at Wisconsin for helping to fund this research. David R. Olson provided expert assistance in computer programming; Michael Leavitt and James R. Taylor gave valuable advice on presentation of data. 1. Recent analyses include Gino Germani, Politica y sociedad en una e'poca de transici5n: de la sociedad tradicional a la sociedad de masas (Buenos Aires, 1963), Ch. 9; Samuel Baily, Labor, Nationalism, and Politics in Argentina (New Brunswick, N. J., 1967); Peter G. Snow, The Class Basis of Argentine Political Parties, American Political Science Review, 63:1 (March 1969), 163-67; Peter H. Smith, Social Mobilization, Political Participation, and Rise of Juan Peron, Political Science Quarterly, 84:1 (March 1969), 30-49. For some conflicting views on general question of Peron's popularity see Joseph R. Barager (ed.), Why Pero'n Came to Power: Background to Peronism in Argentina (New York, 1968).\An important new study, based on a survey taken in 1965, is Jeane Kirkpatrick, Leader and Vanguard in Mass Society: A Study of Peronist Argentina (Cambridge and London, 1971), esp. Chs. 4 and 5.