"Thomas Jefferson, one of our most important founding fathers, confirmed the purpose of the separation of powers between state and federal governments. He confirmed that the purpose of the federal government was to regulate commerce and interaction with foreign countries and that it never had the authority or jurisdiction to invade within states, either through legislation or through police powers:
"The extent of our country was so great, and its former division into distinct States so established, that we thought it better to confederate [U.S. government] as to foreign affairs only. Every State retained its self-government in domestic matters, as better qualified to direct them to the good and satisfaction of their citizens, than a general government so distant from its remoter citizens and so little familiar with the local peculiarities of the different parts." --Thomas Jefferson to A. Coray, 1823. ME 15:483
"I believe the States can best govern our home concerns, and the General Government our foreign ones." --Thomas Jefferson to William Johnson, 1823. ME 15:450
"My general plan [for the federal government] would be, to make the States one as to everything connected with foreign nations, and several as to everything purely domestic." --Thomas Jefferson to Edward Carrington, 1787. ME 6:227
"Distinct States, amalgamated into one as to their foreign concerns, but single and independent as to their internal administration, regularly organized with a legislature and governor resting on the choice of the people and enlightened by a free press, can never be so fascinated by the arts of one man as to submit voluntarily to his usurpation. Nor can they be constrained to it by any force he can possess. While that may paralyze the single State in which it happens to be encamped, [the] others, spread over a country of two thousand miles diameter, rise up on every side, ready organized for deliberation by a constitutional legislature and for action by their governor, constitutionally the commander of the militia of the State, that is to say, of every man in it able to bear arms." --Thomas Jefferson to A. L. C. Destutt de Tracy, 1811. ME 13:19
Note that Jefferson said that the federal government was given jurisdiction over foreign affairs only, which includes foreign commerce. The only exception to this general rule is subject matter within the states over the following:
1. Slavery under the Thirteenth Amendment.
2. Counterfeiting under Article 1, Section 8, Clause 5 of the Constitution.
3. Mail under Article 1, Section 8, Clause 7 of the Constitution.
4. Assaults and infractions against its own officers under Article 1, Section 8, Clause 18 of the Constitution.
5. Treason under Article 3, Section 3, Clause 2 of the Constitution.
Every other type of subject matter jurisdiction exercised by the federal government within the states is not authorized by the Constitution, and therefore can only be undertaken with the voluntary consent and participation of the state governments and the people within them. This type of consensual jurisdiction is called “comity”.
Jefferson’s statements above are also fully consistent with our system of federal taxation. For instance, Article 1, Section 8, Clause 3 of the U.S. Constitution limits federal taxation powers to commerce with foreign nations and between, but not within, states. 26 CFR § 1.861-8(f) also reveals that the only specific sources of “gross income” that are taxable under Subtitle A of the Internal Revenue Code are those associated with Domestic International Sales Corporations (DISC) and Foreign Sales Corporations (FSCs), both of whom are involved in commerce with foreign countries only. Even the IRS' own publications in the Federal Register confirm that this was the original intent of the founders. Below is an excerpt from the Federal Register, Volume 37, page 20960 dated October 5, 1972:
"Madison’s Notes on the Constitutional Convention [see Federalist Paper #45] reveal clearly that the framers of the Constitution believed for some time [and wrote this requirement into the Constitution] that the principal, if not sole, support of the new Federal Government would be derived from customs duties and taxes connected with shipping and importations. Internal taxation would not be resorted to except infrequently, and for special [emergency] reasons. The first resort to internal taxation, the enactment of internal revenue laws in 1791 and in the following 10 years, was occasioned by the exigencies of the public credit. These first laws were repealed in 1802. Internal revenue laws were reenacted for the period 1813-17, when the effects of the war of 1812 caused Congress to resort to internal taxation. From 1818 to 1861, however, the United States had no internal revenue laws and the Federal Government was supported by the revenue from import duties and the proceeds from the sale of public lands. In 1862 Congress once more levied internal revenue taxes. This time the establishment of an internal revenue system, not exclusively dependent upon the supplies of foreign commerce, was permanent."
http://famguardian.org/Subjects/LawA...rsDoctrine.htm