In America, the Democratic Party thinks slavery is 'indispensable to good government', and is 'the normal condition of one seventh part of the people'.

"The relation of slavery to a Republican form of government" (26 May 1858), New England Anti-Slavery Convention. - The relation of slavery to a Republican form of government (1858)

The relation of slavery to a Republican form of government: a speech delivered at the New England Anti-Slavery Convention, Wednesday morning, May 26, 1858