The 2006 UC Davis “district expert survey” has been released for general use by the scholarly community. The district expert survey was conducted in a random sample of 100 U.S. House districts in 2006, and in a supplemental sample of 55 districts chosen because they were expected to be open and/or competitive. National convention delegates and state legislators in both political parties were surveyed by mail as district expert informants in October of 2006. The size of these district panels varied by district but averaged just over 6 per district.