Ole and Lena are central characters in jokes by which specific portion of  Americans, in the broad sense?
Ole and Lena Ole and Lena (also Sven and Ole) are central characters in jokes by Scandinavian Americans, particularly in the Upper Midwest region of the U.S., particularly in Minnesota, Wisconsin, Iowa, South Dakota and North Dakota where Scandinavian immigrant traditions are common.
National Lampoon (magazine) National Lampoon was an American humor magazine which ran from 1970 to 1998. The magazine started out as a spinoff from the "Harvard Lampoon". "National Lampoon" magazine reached its height of popularity and critical acclaim during the late 1970s, when it had a far-reaching effect on American humor and comedy. The magazine spawned films, radio, live theatre, various sound recordings, and print products including books. Many members of the creative staff from the magazine subsequently went on to contribute creatively to successful media of all types.