We crossed that bridge with the Fugitive Slave Act which compelled Free States to actively intervene on behalf of slavers.
Slavery was wrong but legal.. the WAR of Northern Aggression forced the issue.. a cabal of States trying to force democracy on other States..
You mean the War of Southern Aggression which attempted to bend the rest of the country to its will and then tried to blow up the country when it failed.
NO...
I would suggest that you read Article I, Sec. 9, of the Constitution, and stop trying to pick fights with people from the one region of America, which has the highest level of support for traditional American freedom.
Or maybe you would consider the views of Massachusetts' Senator Daniel Webster, the leading anti-slavery voice in the North, for many years, on the Constitutional argument: Daniel Webster.
There is no slavery issue in America in 2015, except that which goes to the contemporary attack on our liberty being waged by the Obama Administration. Conservatives need to come together on that issue, while continuing to recognize that the Constitution deliberately left issues of health, safety & morals to the States.