You're at least willing to concede there were other significant issues involved. The usual PC Revisionists on here can't even bear to admit that. As to your claim that it was "mostly" about slavery, everything in the article belies that. Their entire concern was about economics and they couldn't have cared less about slavery - urging conciliation on that issue. That by the way, was the position of the Lincoln administration. Thus the Corwin Amendment. No the Manchester paper did not admit the Northern states were exploiting the Southern states (though they were). But they did admit that what really mattered to the Northern states was the money - not slavery. The fact that the original 7 seceding states turned down conciliation over slavery in order to pursue economic independence shows that the economics and not slavery were what was most important to them. The Upper South of course seceded over the constitutional issue of using force against another state for seceding - again, not over slavery.
x: I missed the Horatio Seymour quote. That is also not an "admission contrary to interest." Seymour, the "White Man's Candidate" for president in 1868, was trying to rebuild the Democratic Party. He didn't want Black enfranchisment. He wanted and needed those Southern Democrats in Congress to rebuild his party and take it to power. He was acting in accord with his party and his own interests and ambitions, not admitting anything that would hurt them. The tariff wasn't going to come down in 1866 because of the necessity of paying off the war debt. Seymour really should have known that, but instead he was playing politics.
You make the same mistake as BroJoeK in assuming Northern Democrats were somehow not Northerners....or did not represent Northern interests. They of course, did. Here Seymour is admitting once again, that THE key issue is Tariffs, not slavery or even the broader "negro question". Tariffs more than anything else divide North and South. The....let's face it....White men who lead both regions can sit down and bargain when it comes to Blacks. When it comes to the money however, they're prepared to fight.
That's a Democrat paper in a manufacturing town. It's what mattered to them. What mattered to the Northern states in general was the union and the nation. But the Union Democrat isn't saying anything about what mattered to the South. They didn't say that tariffs or Northern profits were what motivated to the rebel states.
You make the same mistake as BroJoeK in assuming Northern Democrats were somehow not Northerners....or did not represent Northern interests.
Some actually didn't. Many Northern Democrats were closer to Southerners than to Northern Republicans when it came to slavery. Northern Democrats did not favor high tariffs, and they had their own donors who didn't want high tariffs either. NYC importers didn't want high tariffs.
White men who lead both regions can sit down and bargain when it comes to Blacks.
Seriously? Do you know anything about history? The victors weren't going to "bargain" with the losers about the fate of the freed slaves. Winners and losers had been killing each other only a year before, and the winners weren't in the mood to bargain. The losers had made clear that they didn't want to concede anything to the freedmen, not even real freedom. You demonstrate once again that you don't know what you're talking about and aren't worth arguing with.