Final answer:
The Anti-Federalists, who opposed the proposed Constitution, were chiefly supported by skilled workers, small farmers, and some plantation owners. They feared centralized power and wished to preserve an agrarian economy and state sovereignty.
Step-by-step explanation:
The chief supporters of the group opposing the proposed Constitution in the debates, known as the Anti-Federalists, were primarily skilled workers, small farmers, and to a lesser extent, plantation owners. The Anti-Federalists were wary of the centralization of power and the potential for a political aristocracy, which they felt would favor the rich over the common people. They desired to see the economy remain predominantly agricultural and favored state legislatures over a powerful national government, as they believed that state legislatures were more in touch with their freedoms.