Not Constitutionally wrong, the SCOTUS had ruled that the States had the right to voluntarily leave the Union. Ricmc2175
The Supreme Court never issued such a ruling. Wideawake
The entire decision is available on the Web at
http://supct.law.cornell.edu/supct/cases/historic.htm
You cannot claim that there is a specific Supreme Court ruling and then provide a generic link to an enormous database as a citation.
Give us the name of the specific case so it can actually be found.