Final answer:
Warren G. Harding's presidential campaign in 1920 centered on a 'return to normalcy,' promising a respite from the wartime and postwar turbulence, focusing on business support and fewer international commitments.
Step-by-step explanation:
Warren G. Harding won office by campaigning on the theme of a return to normalcy. This slogan encapsulated the American public's desire to retreat from the hectic and disruptive period of World War I and seek comfort in more familiar, peacetime routines. In his campaign, Harding articulated a vision of respite and recovery, stating that the nation needed restoration and not revolution or heroics. His presidency saw policies that endeavored to support businesses at home while avoiding international entanglements, aiming to provide the stability and normalcy that the electorate craved.