This is the catch-all that Congress uses to justify anything they want. The way this is interpreted by the courts lets Congress rule on anything that involves money that has passed over a state border at some point.

Change "has passed" to "might pass".

Until you start viewing divorce settlements as "interstate commerce", you have no idea how broad this grant has become.

All that it says is that Congress has the power To regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes;. Here is [link|http://caselaw.lp.findlaw.com/data/constitution/article01/28.html|how it is interpreted].

Cheers,
Ben