In this work, Sean Dettman traces an observable correlation over the course of late summer 1940 between the bombings of London and other UK cities and the changing attitude of the American people towards adopting a moderate pro-aid position, and argues that these processes were aided by pro-aid US journalists who deployed a positive Blitz narrative centered on themes of resilience, courage, and fortitude. This shift in US public opinion allowed the Roosevelt Administration and pro-aid pressure groups to advance conversations in Washington towards aiding Britain, even at the risk of war. Dettman also argues that this shift in opinion was caused by fear that a Nazi victory would threaten US national security and the American way of life, rather than an interest in expanding pro-democratic structures and institutions in Britain.  Whereas the vast body of literature examining US public opinion during the ‘Great Debate’ reduces the Blitz narrative to a minor cause, America and the Blitz demonstrates how the Blitz narrative influenced domestic conversations regarding US national security and the American way of life. The author reveals that when the events and themes of the Blitz come into dialogue with conversations about US aid to Britain and national security, the traditional narrative changes. America and the Blitz offers a new framework for understanding the ‘Great Debate,’ revealing the relationship between US journalists’ Blitz narrative and its effect on US public opinion towards aiding Britain and the ascendancy of American global power.