Complex sentence: An ardent supporter of state rights, Henry was an outspoken critic of the United States Constitution and led the Virginia opposition to its ratification, arguing that it gave the federal government too much power and that the untested office of the presidency could devolve into a monarchy.
Split into simpler sentences: An ardent supporter of state rights, Henry was an outspoken critic of the United States Constitution. He worried that the untested office of the presidency could devolve into a monarchy.