Poster for presidential candidate Shirley Chisholm, National Museum of African American History and Culture https://www.rawpixel.com/image/8846977/image-papers-art-vintageFree Image from public domain licensePinback button for Kennedy - Johnson 1960 presidential campaign, National Museum of African American History and Culture https://www.rawpixel.com/image/8846909/photo-image-art-vintage-public-domainFree Image from public domain license