Data from the National Annenberg Election Survey (NAES) show that during the 2004 presidential election campaign, party affiliation was not entirely stable. The gap between Democrats and Republicans narrowed, continuing a pattern evident in the 2000 NAES. However, the Democrats retained their edge in party identification. Demographically, Republican party identification grew most among white evangelical Protestants. Slight gains were made among men and women. An analysis of party breakdown by state shows Republicans made significant gains in southern states but also grew in Maine and Oregon. The Democratic party made gains in a handful of states around the country.