You're right A17 is a big factor in the dysfunction of the federal government. I also like your clarification of the commerce clause. Good job!
Thank you! I must give credit to James Madison, who said that the power to regulate commerce among the several States "...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,".¹
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¹James Madison
13 Feb. 1829 Letters 4:14--15
http://press-pubs.uchicago.edu/founders/documents/a1_8_3_commerces19.html