Final answer:
The Committee for Economic Development submitted a brief in the case of McConnell v. FEC, supporting restrictions on campaign contributions to prevent corruption. This brief is relevant to theories of regulation as it argues for regulations that protect the integrity of the electoral system.
Step-by-step explanation:
In the case of McConnell v. FEC, the Committee for Economic Development submitted a brief supporting the restrictions on how candidates and parties could spend campaign contributions. They argued that these restrictions are necessary for preventing corruption and undue influence in the political process. The relevance of this brief to theories of regulation is that it supports the idea that certain regulations are necessary to protect the integrity of the electoral system and ensure fair and transparent elections.