What were the constitutional problems during and about the Civil War?

Lincoln suspended habeas corpus and threw a congressman into jail without trial for speaking for the Confederacy at Mount Vernon. Look up ex parte Vallandingham

All of the Southern states signed the United States Constitution. The Constitution is a legally binding document; therefore making it illegal for any states to secede from the Union.

"Constitutional issues leading up to and during the Civil War;

and postwar issues aside from Reconstruction"

https://pages.wustl.edu/calvert/civil-war-era-cons...

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The Constitution does not directly mention secession. ... The Supreme Court has consistently interpreted the Constitution to be an "indestructible" union. There is no legal basis a state can point to for unilaterally seceding.

Texas v. White, (1869), U.S. Supreme Court case in which it was held that the United States is “an indestructible union” from which no state can secede. ... After the Civil War the Reconstruction state government filed a suit in the Supreme Court seeking to recover the bonds, then held by citizens of various states.

Besides the fact that the South Constitutionally was allowed to leave?

No essay questions please.

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