Thanks for helping our side out. In fact, the Northern States did refuse to enforce the fugitive slave laws, the Constitution to the contrary notwithstanding, and did practice their own version of Nullification -- a fact which isn't taught in school -- until Dred Scott upset their apple-cart.
Fact is, Lincoln was the revolutionary. Lincoln overthrew States' rights, the federal system, and the Constitution's separation of powers between the States and the federal government. Now the South is the toy of the North, States are toys of the Feds and the People their meat and drink. What is so hard about figuring that one out?!