George Ticknor Curtis, The Presidents of the United States… (1914)
“ Buchanan never for a moment admitted that a state had any power to secede from the union. South Carolina had once and forever adopted and ratified the constitution of the United States, and he maintained that she had by this act permanently resigned certain powers to the federal government, and that she could not, by her own will and without the consent of the other states, resume those powers and declare herself independent. She could, if actually oppressed by the general government, seek to redress her wrongs by revolution; but never by secession. ”
