[Secret Agent Man]

Yup. And a whole bunch of other alphabet groups.

[Edward.Fish]

My list of Constitutionally authorized agencies:

1. The Treasury
2. The Army
3. The Navy (Marines are under here)
4. The Post Office
5. The DOT (though scaled back; essentially ensuring interstate repair and [minimal] safety standards)
6. The Secret service (though scaled back [no protection of politicians; only investigation of counterfeiting])
7. The IRS (Amd #16 is valid.)
8. Dept of Commerce (only international and interstate; no intrastate jurisdiction)
9. INS
10. Copyright Office
11. Patent Office

I might be missing one or two, but Art 1 Sec 8 is actually very limiting.