Al Capp veterans returning from the war. Capp was also involved with the Sister Kenny Foundation, which pioneered new treatments for polio in the 1940s. Serving in his capacity as honorary chairman, Capp made public appearances on its behalf for years, contributed free artwork for its annual fund-raising appeals, and entertained crippled and paraplegic children in children's hospitals with inspirational pep talks, humorous stories and sketches. In 1940, an RKO movie adaptation starred Granville Owen (later known as Jeff York) as Li'l Abner, with Buster Keaton taking the role of Lonesome Polecat, and featuring a title song with lyrics by Milton Berle.
Al Capp of a plea agreement, Capp pleaded guilty to the charge of "attempted adultery" (adultery was a felony in Wisconsin) and the other charges were dropped. Capp was fined $500 and court costs. In a December 1992 article for "The New Yorker," Seymour Hersh reported that President Richard Nixon and Charles Colson had repeatedly discussed the Capp case in Oval Office recordings that had recently been made available by the National Archives. Nixon and Capp were on friendly terms, Hersh wrote, and Nixon and Colson had worked to find a way for Capp to run against Ted Kennedy for the U.S.