Hugh Gallagher explored what he called FDR’s Splendid Deception in his 1985 book of that title. In the title Gallagher was referring to FDR’s concealment of the polio-related paralysis that struck him in 1921. Gallagher was also a polio victim who understood the pain underlying Roosevelt’s efforts. Researching the book, Gallagher found that among the 35,000 photographs of Roosevelt at his presidential library, only two featured him in his wheelchair. Media of the day cooperated by ignoring his polio. Roosevelt himself went to extraordinary lengths to convey the impression that he could walk. “[T]he overwhelming fact about [FDR] is that...