If you would take a moment to read the speech, you would note that Senator Clingman addressed that fallacy at length.
Here are the tariffs collected for the period June 1858 to June 1859 for the three largest Northern and the nine largest southern ports. The source is from "statement Showing the Amount of Revenue Collected Annually", Executive Document No.33, 36th Congress, 1st Session, 1860":
New York $35,155,452.75
Philadelphia $2,262,349.57
New Orleans $2,120,058.76
Charleston $299,399.43
Mobile $118,027.99
Galveston $92,417.72
Savannah $89,157.18
Norfolk $70,897.73
Richmond $47,763.63
Wilmington, NC $33,104.67
Pensacola $3,577.60
Looks like NYC and Philly @ $37 million with the nine southern ports at less than $3 million.
Walt
" Now, it is idle for the honorable Senator to tell me that the importations at Charleston and Savannah were small. I know that the merchants have gone from those cities to New York, and bought goods there; that goods are imported into New York are bought there, and then are sent down and deposited at Charleston, New Orleans, and other places. But, in point of fact, here is an enormously large consumption of dutiable articles, from one hundred to one hundred and fifty million. These people make their own provisions mainly, and cotton to sell, and do very little in the way of manufactures. Their manufactured goods came from the United States, or from foreign countries. I put the question to the honorable Senator, how much duty does he think this Government is going to lose by the secession of those States, supposing, of course, that they do not pay us any duties; for if New England goods are to pay the same duty with those of Old England, and Belgium, and France, we all know that the New England goods will be excluded, unless they make up their minds to sell much cheaper than they have been heretofore doing? I was curious, the year before last, in going through Europe, to ascertain, as well as I could, the value of labor and the prices of articles, and I was astonished at the rate at which goods may be purchased all over the continent, compared with similar articles here. The reasons they are not furnished as cheap here, is partly due to the circuitous trade. For example: houses in England purchase up articles in Belgium, France, Germany, and even Italy, and make a handsome profit; they then send them to New York, and handsome profits are made there by the wholesale dealers and, finally, they get down south, and in this way they are very high; but the tariff has also operated very largely. That Senator knows, as well as I do, and everybody knows, that if there be direct trade with Europe by these States; if goods are not to go around through New York, and not to pay duties ? and you may be sure they will not go there under his tariff, for nobody will pay a duty of fifty or seventy-five per cent. on what he imports, when he can send the goods to another port for fifteen or nineteen per cent. ? the result will be, that these States certainly will pay this Government no duties at all."
The Morrill tariff was designed to hurt the south. Live with it.