America chooses. From Truman to Trump. Presidential elections in the United States since 1948. Book 1. From the 'Roosevelt era' to the 'Eisenhower Era' - the elections of 1948-1956. For the first time in Russian historiography, the monograph explores such a specific topic as the course of campaigns in the US presidential elections in the era of the Cold War since the 1948 elections. Russian Russian factor in American public policy, among other things, the study examines the so-called "Russian factor" in American public policy and refers to Soviet-American (and then Russian-American) relations during the presidential elections in the United States, describing the influence of the "Russian factor" on American politics during the campaigns. In addition, the author pays special attention to the personalities of presidential candidates, their views, election platforms and the course of campaigns, primarily the geography of election tours, as well as the main speeches of candidates delivered by them throughout the campaign. The work is written on the basis of an extensive database of historical sources: archival materials, official documents, opinion polls, periodicals, reference data that are publicly available on the Internet, etc. The book will be of interest not only to historians, political scientists, teachers and university students, but also to the widest range of readers.