Rutherford B. Hayes was the 19th presedent
The Constitution was written with great hypocrisy of course, because when the drafters wrote "we the people" they were really only referring to white men, not women or slaves.
Between about 1855 and 1859, Kansans engaged in a violent guerrilla war between pro-slavery and anti-slavery forces in an event known as Bleeding Kansas which significantly shaped American politics and contributed to the coming of the Civil War.