“…A better approach could be to apply pooled time-series cross-section methods with county-level observations in a manner similar to previous studies of the consequences of Republican Party development on statewide Democratic factions (Berry and Canon, 1993;Black, 1983;Canon, 1978), with the caveat that particular care should be taken to choose the appropriate statistical techniques. The concern is that, during the period through the 1940s, bipartism cannot explain variation in local factional structures because in most states of the region there was no variation in the level of two-party competition, although once the Republican Party became a political force, variations in its strength could reasonably influence Democratic factional structures.…”