i think its to make treaties;)
Reserved powers belong to the states. Reserved powers are the powers that are not granted to the National Government by the Constitution and they are not denied to the states.
Powers prohibited to the federal (national) government under the US Constitution are called Denied powers.
lists the powers given to national government and the powers denied the states and leaves all other powers to the states
the national government and the state governments
Reserved powers are powers denied to the national government. Reserved powers are also not denied to the states. These types of reserved powers are referred to as police power of the state.
reserved powers
printing money
According to the 10th Amendment, all powers are reserved to the state that are not expressly given to the national level of government yet not denied to the states.
The power to pass laws retroactively.
Delegated Powers
Powers that the constitution sets aside for state governments
Denied powers - apex