[Solitar]

The Constitution does not empower the States.
The Federal government does not empower the States.
If a power is not prohibited to the States, noror delegated to the Federal government, then the States have that power.

[Non-Sequitur]

If a power is not prohibited to the States, noror delegated to the Federal government, then the States have that power.

OK. Who decides if a power is delegated to the Federal government?