“…Prior to the changes of the 1960s, open seats were likely to go to the party that the district supported at the presidential level, but a host of empirical findings show that in the new context, where national and district-level races have become detached, national conditions do not drive congressional election results on their own. Indeed, Flemming (1995) has quantified the degree of separation between presidential and congressional races, finding that presidential coattails proved decisive in only 13% of all open-seat races from 1972 to 1992. Thus, in the new context, open seats present parties with a new opportunity to gain seats (Bond, Fleisher, and Talbert 1997;Gaddie 1995Gaddie , 1997Gaddie and Mott 1998;Gaddie, Bullock, and Buchanan 1999).…”