Answer:
Many states already had a Bill of Rights.
Explanation:
In the Philadelphia Convention of 1787, the ratification of the US Constitution was presented by the federalists to give Congress more power and authority. However, the Bill of Rights contained in the constitution was the bone of contention between federalists and anti-federalists.
The federalists opposed the Bill of Rights because they felt that it would give individuals too much of power. This is because many states already had a Bill of Rights in their own respective state constitutions. The Federalists believed that it was unnecessary to include the provision of Bill of Rights in the US Constitution because the people and the states already had too much of powers.