Is it possible for a Northern state, not the border states a full blown northern state, to secede to the CSA? I'm thinking its ASB but it just popped into my head and got me wondering. New Jersey possibly, It was the last northern state to ban slavery and wasn't fazed out until the 30's. in 1860 Jersey was pro south and was the only free state to not vote for Lincoln. Now obviously it would be quickly conquered by the Union but what would the effects be
Not a border state?
jersey is probably too far north, and at this point I think it was solidly a free state (albiet fairly conservative IIRC).
There were a few plans in some western areas to secede. California, Colorado, and New Mexico, although only the first of those was a state at the time and New Mexico is probably the only territory where the southern sympathizers had a realistic chance.
Now, they weren't planning on joining the confederacy, but there were some plans in the (old) northwest to rebel and form an independent republic. Obviously, these came to nothing, but still...