This study measures changes over nearly thirty years in the amount of aid provided by state governments to public libraries and the relationship of these changes to the party in power. Aid is examined at two levels: the first views the party in power at the inception of state aid the second notes the party when a significant increase is made in aid levels. Neither condition produces a definitive relationship to the party in power as defined by the study, and progress in aid seems nearly evenly divided between the ascendant parties, or at least in proportion to the dominant party across the United States at the time. The study does reveal a regional correlation to arbitrary groupings of the states into the Northeast, South, Midwest, and West and it tends to show that the more urban and populous the state, the greater is the legislative and executive support for such aid. Future analyses will move beyond the two valued party in power variable to examine the personalities of the governor, state librarians, and peculiar economic and educational situations and their relationship to legislative action or nonaction as regards library support at the state level. (RAA)