Which side believed that the states should have more power than the national government?

The side that believed states should have more power than the national government was primarily represented by the Anti-Federalists during the early years of the United States. They argued for a decentralized government structure, emphasizing states' rights and individual liberties. This perspective was rooted in the fear of a strong central authority potentially infringing on personal freedoms and local governance. Their stance influenced the eventual inclusion of the Bill of Rights to protect individual and state rights.