The US Constitution is a system where the President can veto a bill that Congress approves, to ensure that the government does not gain too much power. The Constitution was implemented to fix America's weak political structure.
Checks and Balances is a system used to balance all branches of the government so that one branch doesn't over power the others. Anti-Federalists wanted a strong state government and a Bill of Rights. They didn't want national government to become to powerful. While as Federilists wanted no Bill of Rights and a Strong national government. The Articles of Confederation had an extremely weak state government and caused a lot of issues.
(If you would like me to go more into detail about anti fed and fed i can same with the aoc)
