This article builds on previous research with an analysis of partisan differ ences in the emergence of politically experienced candidates in open seat House races from 1976 to 1994. Consistent with previous research, we find that local partisan forces-the normal vote in the district and the party hold ing the seat-are the most important determinants of whether experienced candidates emerge in open seat races. But we find that Republicans are more sensitive to local partisan forces than Democrats, indicating that experienced Republicans run mainly in districts favorable to Republicans, whereas Demo crats run for open seats in a wider range of districts. And contrary to previous research, we discover that a national condition-presidential popularity-is significantly related to the emergence of experienced Republicans in open seats. These results reveal that we need to look for different relationships across the parties. Because we suspected that the relationships might have changed in recent elections, we compared relationships in 1976-90 and 1992- 94. This analysis indicates that the relationships found in previous elections may have changed. In 1992-94, the emergence of experienced Democrats was significantly affected only by the party holding the seat, whereas the emergence of experienced Republicans was not significantly influenced by either local partisan condition.