[goodells]

Agreed, and virtually anything not enumerated would fall under either the Elastic Clause[1] or the Commerce Clause[2] giving Congress power to regulate it.

[1] - https://en.wikipedia.org/wiki/Necessary_and_Proper_Clause

[2] - https://en.wikipedia.org/wiki/Commerce_Clause (technically an enumerated power, but the broadest and vaguest one by far)