Now we are getting somewhere. The Supreme Court also said that secession was illegal. If you accept the other Supreme Court rulings as valid then you must accept also their decision on Texas v. White. True?
I'll add that the Supreme Court ruled that suspending habeas corpus in Indiana were wrong because Indiana was not in rebellion and the civil and federal courts were freely operating. At that time Lincoln had been operating on the authority that congress gave him to suspend habeas corpus whenever he felt it necessary. The Supreme Court has never ruled on the issue of whether Lincoln was wrong in suspending habeas corpus in Maryland in 1861.