What if the president could create, enforce, and decide if laws are unconstitutional? In 1787 a group of delegates representing the states meant tin Philadelphia to create a new set of rules for are government to follow.The delegates had different ideas of how to split the power one of the ideas was federalism,splitting the power between state governments and the federal government .The rules had to give the government enough power to run the nation but not enough to become tyrants. How did the new constitution protect against tyranny? The constitution protected against tyranny with federalism, the separation of power, and checks and balances. Federalism prevents against tyranny by dividing the power between the federal and state government.