Conversation so far:
What did James Buchanan do in his final years?
James Buchanan spent most of his remaining years defending his actions leading up to the Civil War, which was even referred to by some as Buchanan's War.
How did defending his actions leading up to the Civil War effect James Buchanan in his final years?
James Buchanan became distraught by the vitriolic attacks levied towards him, and fell sick and depressed.
What was the response to James Buchanan's support of the Union?
James Buchanan received angry and threatening letters daily.
What did James Buchanan do after receiving angry and negative responses from the public?
In October 1862, James Buchanan defended himself in an exchange of letters with Winfield Scott, published in the National Intelligencer.
How did the public blame James Buchanan for the Civil War?
Newspapers accused James Buchanan of colluding with the Confederacy.
Was James Buchanan approached and blamed for the Civil War when he went outdoors?

Question: How did he defend himself?
Self-contained rewrite: How did James Buchanan defend himself during his final years?