I come across this expression in this public lecture "Analogy as the Core of Cognition" by Douglas Hofstadter. (http://shc.stanford.edu/events/calendar/2006-2-6-douglas-hofstadter-analogy-as-the-core-of-cognition.html). Roughly 15-20min into the video.
When Doug made this humorous remark, laughters erupted in the room. I do not quite get the joke though. Could anyone explain the significance of Delaware here?