Agree. Madison stated very clearly the original understanding of the power to regulate commerce among the several states:
...it grew out of the abuse of the power by the importing States in taxing the non-importing, and was intended as a negative and preventive provision against injustice among the States themselves, rather than as a power to be used for the positive purposes of the General Government...
James Madison to Joseph C. Cabell, 13 Feb. 1829
http://press-pubs.uchicago.edu/founders/documents/a1_8_3_commerces19.html
What all is required to call a Constitutional Convention, and where do you hold it?
Do the Governors manage it? Or Secretaries of State?