Explain confederal system of government

The confederal form of government is an association of independent states. The central government gets its authority from the independent states. ... The country may be divided into states or other sub-units, but they have no power of their own. Confederalism is a system of organisation in which there is a union of states with each member state retaining some independent control over both internal and external affairs. For international purposes there are separate states rather than just one state. Nations can choose to follow or not follow the lead of the weak central government. Examples: The Commonwealth of Independent States (CIS), formerly known as the Soviet Union. Also, Switzerland's canton system and the Confederate States of America (1861-1865).

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they spoke with the president

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the us constitution is a living document, meaning that it can be changed over time as the country changes.