In order to explore the formation of partisan preferences, this paper devel
ops a political-economic model of the US providing micro-foundations for bo
th the genesis and consequences of unemployment. It predicts the standard f
indings (1) that Democratic administrations are associated with higher econ
omic growth than are Republican administrations; and (2) that the electorat
e's partisan preference is influenced by the relative likelihood of unemplo
yment. These two patterns and the link between them are explained in terms
of the decisions of rational agents facing uncertain elections and competit
ive labor markets. Specifically, differences in the parties' fiscal policie
s affect individuals' employment decisions. Agents use labor contracts to e
xploit the resulting economic uncertainty. The partisan preferences of the
electorate are then influenced by employment status. This explanation avoid
s certain limitations in the work of Hibbs and Alesina.