Considering a range of political mobilization questions, this study ex
amines the turnout of U.S. state electorates in the 1988 and 1990 elec
tions. High stimulus presidential, gubernatorial, and senatorial campa
igns encourage participation, controlling for the structuring influenc
e of state sociodemographic characteristics (e.g., levels of education
, age, and urbanization). Relying on an analytic framework that concep
tualizes state electorates within a stream of differentiated electoral
information, the analyses also reveal the importance of distinguishin
g among campaigns and across electoral settings. In an on-year, an ove
rriding stimulus from the presidential contest markedly attenuates the
role of lower-level contests in mobilizing a state's citizenry. In an
off-year, similar to their relative influence on electoral outcomes,
high-profile campaigns on the part of gubernatorial and senatorial cha
llengers appear to be more important than the campaigns of incumbents
in getting voters to the polls.