which group would have made these arguments in 1787?

It is not clear what specific arguments are being referred to in this question. However, in 1787, during the Constitutional Convention in the United States, different groups such as the Federalists and Anti-Federalists debated and made arguments regarding the structure and powers of the federal government, the balance of power between the states and the federal government, the need for a Bill of Rights, and other key issues related to the proposed Constitution. Depending on the specific arguments being discussed, it could be either the Federalists or Anti-Federalists who would have made those arguments in 1787.