Why did the federal government need to step in?

In their attempt to balance order with liberty, the Founders identified several reasons for creating a federalist government: to avoid tyranny. to allow more participation in politics. to use the states as "laboratories" for new ideas and programs.

it was important in history as the site of the ancient city of yin

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these the citzens and goverment come to terms some of the amendments gave the states more power then the goverment and some protocted americans rights