These are the references for further information regarding the history of the Republican Party in the U.S. since 1854.
Secondary sources
Surveys
American National Biography (20 volumes, 1999) covers all politicians no longer alive; online at many academic libraries and at Wikipedia Library. Burnham, Walter Dean. Critical Elections and the Mainsprings of American Politics. (1970) Barone, Michael. The Almanac of American Politics 2020: The Senators, the Representatives and the Governors: Their Records and Election Results, Their States and Districts (2019); revised every two years since 1975. Dinkin, Robert J. Voting and Vote-Getting in American History (2016), expanded edition of Dinkin, Campaigning in America: A History of Election Practices. (Greenwood 1989) online 1989 edition , the best overview. , very well written scholarly work Kleppner, Paul, et al. The Evolution of American Electoral Systems (1983), applies party systems model Mason, Robert. The Republican Party and American Politics from Hoover to Reagan (2011) excerpt and text search Mayer, George H. The Republican Party, 1854–1966. 2d ed. (1967), narrative. Prentice, David L. "The Republican Party and US Foreign Relations" (2019) Oxford Research Encyclopedias Rutland, Robert Allen. The Republicans: From Lincoln to Bush (1996), popular , long essays by specialists on each time period: includes: "'To One or Another of These Parties Every Man Belongs;": 1820–1865 by Joel H. Silbey; "Change and Continuity in the Party Period: 1835–1885" by Michael F. Holt; "The Transformation of American Politics: 1865–1910" by Peter H. Argersinger; "Democracy, Republicanism, and Efficiency: 1885–1930" by Richard Jensen; "The Limits of Federal Power and Social Policy: 1910–1955" by Anthony J. Badger; "The Rise of Rights and Rights Consciousness: 1930–1980" by James T. Patterson; and "Economic Growth, Issue Evolution, and Divided Government: 1955–2000" by Byron E. Shafer Schlesinger, Arthur Meier Jr. ed. History of American Presidential Elections, 1789–2000 (various multivolume editions, latest is 2011 with Gil troy as coeditor). For each election includes good scholarly history and selection of primary document. Essays on the most important election are reprinted in Schlesinger, The Coming to Power: Critical presidential elections in American history (1972) online editions of multivolume set