Final answer:
In Mexico, the supporters of a federal system of government similar to the United States were called Federalists, just as in the American context during the ratification period of the Constitution.
Step-by-step explanation:
Those in Mexico who supported the establishment of a federal system of government like that in the United States were known as Federalists. The term Federalist was historically used to describe the supporters of the proposed Constitution during the American ratification period, as they advocated for a stronger central government, but with mechanisms for a balance of power that would leave significant authority to individual states. Similarly, in Mexico, Federalists were those who supported the idea of a federal system, where Mexican states would have autonomy akin to the structure established under the U.S. Constitution.