system
A chat on subreddit /r/NoStupidQuestions
human
Not an american, what did the guy do?
gpt
He was the last US President before the Civil War. In issues regarding slavery, he consistently favored the pro-slavery South. US historians often regard him as one of the worst presidents the country's had, because at best he did not do enough to try and prevent secession and at worse he actually enabled the South. While the war did not start until Lincoln's presidency, the first Southern states to leave the Union did so under Buchanan.