Supreme Court Chief Justice Salmon Chase.
Attorney General William Evarts.
Abolitionist attorney Richard Henry Dana.
Etc.
The Chief Justice Chase who ruled the southern secession unconstitutional in the Texas v. White decision?
Attorney General William Evarts
AG Evarts was part of the team prosecuting Davis.
Richard Henry Dana.
Dana's concerns with the Davis trial, of which he was also a member of the prosecution, had nothing to do with the legality of secession.