This paper examines voting by U.S. Representatives on the North American Fr
ee Trade Agreement, the Uruguay Round Agreement, and most-favored nation st
atus for China. Using recent political economy models of trade policy to fo
rmulate an empirical specification of congressional voting behavior, we fin
d evidence that campaign contributions influenced legislators' votes on the
NAFTA and Uruguay Round bills. Labor group contributions were associated w
ith votes against freer trade while business contributions were associated
with votes in favor of freer trade. Economic conditions in each member's di
strict as well as the broad policy views of the legislators also affected r
epresentatives' voting decisions.