John F. Kennedy is credited with inventing the term in 1958 as part of the ongoing election campaign in which a primary plank of his rhetoric was that the Eisenhower administration was weak on defense. It was later learned that Kennedy was apprised of the actual situation during the campaign, which has led scholars to question what Kennedy knew and when he knew it. There has been some speculation that he was aware of the illusory nature of the missile gap from the start and that he was using it solely as a political tool, an example of policy by press release.