Bob Hope was joking about presidents before it was completely kosher.
For the first time, the library is placing Hope's joke file of 85,000 pages on public view in digital kiosks.
Hope died in 2003 at age 100, but he donated his extensive collection and recordings to the Library of Congress.
Besides Hope's jokes, the library also displays his trademark golf club and his Presidential Medal of Freedom.
Comedian Stephen Colbert greets visitors to the exhibit, "Hope for America: Performers, Politics and Pop Culture," in a video tribute. It will be on view long term at the library.