How does a confederation different from a federation

By definition the difference between a confederation and a federation is that the membership of the member states in a confederation is voluntary, while the membership in a federation is not

Explanation:

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Explanation:

The basic difference between a confederation and a federation is that each confederation member state is the holder of supreme power (sovereignty), whereas the federal units in a federal state have no such power, given the fact that sovereignty is exclusively vested in the federation (federal state).

Executive over the judicial branch. The president appoints all federal judges. legislative branch must approve appointments that the president makes; the Senate must approve treaties that the president makes; and the legislative branch may investigate the executive branch. 

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