Final answer:
Alexander Hamilton was a Federalist who supported the Constitution and a stronger national republic.
Step-by-step explanation:
One of the individuals who supported the Constitution and a stronger national republic was Alexander Hamilton. As a Federalist, Hamilton believed that a centralized republic would be the best solution for the future of the United States. In his essays, such as Federalist No. 35, Hamilton argued that a strong national government could effectively represent the interests of the people, even if the representatives were not their neighbors.