[FLT-bird]

Which had been suspended due to the rebellion in progress, as the Constitution allows.

Which cannot be suspended by the executive branch when there is a functioning court system - which there was.

[DoodleDawg]

Which cannot be suspended by the executive branch when there is a functioning court system - which there was.

In retrospect. That question was not definitively ruled on until Ex Parte Milligan in 1866.