incrediBILL - 9:21 pm on Mar 9, 2010 (gmt 0)

the idea of federal legislation to equalize sales taxes, since such legislation would clearly infringe on State's rights.

The feds are already involved with interstate commerce authorized under Article I of the U.S. Constitution.

The feds can also regulate commerce within a state when it may impact interstate movement of goods and services and may strike down state actions which are barriers to such movement.

So technically applying a flat interstate tax to keep goods and services moving via ecommerce isn't a far stretch IMO.