Objective. Runoff primaries have been alleged to be a limitation on th
e ability of blacks to gain elective office. This research empirically
tests hypotheses regarding the mechanisms of ''disadvantage'' and att
empts to specify conditions under which black candidates could win. Me
thods. Data from all levels of office for three election cycles-1967,
1971, and 1975-in Mississippi are subjected to regression analysis. Re
sults. Black primary leadership is not an artifact of the number of wh
ite candidates, nor do runoff candidates of either race necessarily ha
ve difficulty mobilizing voters. When the first primary is close and t
he black candidate leads, both black and white candidates are able to
rally supporters. Conclusions. Whether runoff primaries work to the di
sadvantage of black candidates depends upon circumstances. It is unlik
ely that elimination of the runoff requirement will increase the numbe
r of black officeholders significantly. Other strategies for increasin
g black officeholding might be more fruitful.