Federalism, the distribution of power between the federal government and the states, was originally implemented to keep both in check. It is another...

Federalism, the distribution of power between the federal government and the states, was originally implemented to keep both in check. It is another of the Constitution's checks and balances. What current issues demonstrate either that the balance is working, or there is a need to restore balance so that it can work? Why did you select the issues you did?