Political posters are powerful tools of persuasion and control via striking visual imagery. Scholarly interest in the strong visual images draws many researchers to Hoover's voluminous poster collection. Others mine more popular parts of the collection, such as this CBC article on National Doughnut Day, which highlights posters of US troops receiving doughnuts and coffee from Salvation Army doughnut lassies during World War I. The CBC picked up these posters—taken from our database of 33,000 digitized posters—via a tweet from the Hoover Archives.

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