The topic of the present paper involves the law of private campaign finance, the regulation of
the amount of money that individuals, legal entities or private groups can devote to support a
preferred candidate or political party. The US Supreme Court has been showing a trend of abolishing
limits on election spending. On the other hand, the Brazilian Supremo Tribunal Federal
issued a partial decision on April 2nd, 2014 striking down the Brazilian framework of campaign
financing by individuals and legal entities. In this article I engage in a comparative study of both
jurisdictions to try to understand if and how each of them differs in the understanding of subjects
that are relevant for the resolution of the issue of private campaign funding.
