[Old Teufel Hunden]

"There was no tariff to complain about during Jefferson's presidency, or at least not in the protective sense"

http://www.suite101.com/content/the-new-england-secession-movement-a133296

You're right in one sense. It was not a tarrif but an outright trade embargo with England and France. A little worse than a tarriff forcing the South to buy the North's goods would you not say? Still Jefferson did not feel that was so onerous by the Federal government that the New England states to secede. The point still stands, he would not have found onerous tarriffs to rise to the level of secession. Nothing you have shown of Jefferson says that. It says that he did not believe in tarriffs. Fine, I don't either.

The main point I made you have not refuted, Jefferson or Madison would not have found the south's two main points to rise to the level of secession. The tarriffs and not extending slavery to the new states and territories.

[conimbricenses]

It was not a tarrif (sic)but an outright trade embargo with England and France.

Very good. And if you look at the constitution, tariffs and embargoes are two VERY different things. Tariffs fall under the Revenue Clause and therefore (according to the theory Jefferson applied, at least) must serve a primary revenue function as a domestic fiscal policy. Embargoes fall within the jurisdiction of foreign policy under the Commerce Clause, and serve a military/diplomatic purpose as was the case with the Napoleonic War embargoes of the late Jefferson administration.

Put another way, an embargo by its very definition has clear constitutional sanction as an uncontested power of the federal government. A tariff may or may not, depending on its use for revenue. And according to the Jeffersonians, only tariffs that were designed to produce revenue met constitutional muster whereas those that were designed to protect domestic industry did not.

[Ditto]

...not extending slavery to the new states and territories.

In point of fact, Jefferson wrote the initial drafts of the Northwest Ordinance which forbade slavery in the territories North of the Ohio river.