How is federalism and sovereign powers dependent on each other

Federalism is a form of government that divides sovereign power across at least two political units. In the context of the United States, power is divided among the national and state governments so that each government has some independent authority.

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question - in the 1900s there were two competing views about the environment that often pitted industrialist and conservationist against one another. how were these two competing views demonstrated by the environmental policies of president roosevelt and president taft?

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not sure might be he acquired the entire oregon territory from great britain