During the Reconstruction era, the Supreme Court declared that secession by a state was unconstitutional and that Congress, in cooperation with the president, had authority to determine policies for the reconstruction of the southern states.
Following the Civil War (1861-1865), the provisional government of Texas attempted to recover title to bonds that had been sold by the Confederate state government during the war. The defendants argued that the state had not yet been readmitted to the Union and thus had no authority to sue in federal court. Writing for a 5-3 majority, Chief Justice Salmon P. Chase
Luther v. Borden
States’ rights and state sovereignty