"A house divided against itself cannot stand. I believe this government cannot endure permanently half slave and half free. I do not expect the Union to be dissolved; I do not expect the house to fall; but I do expect that it will cease to be divided. It will become all the one thing or all the other. Either the opponents of slavery will arrest the further spread of it and place it where the public mind shall rest in the belief that it is in course of ultimate extinction, or its advocates will push it forward until it shall become alike lawful in all the states, old as well as new, north as well as south."

Abraham Lincoln, June 16, 1858, Address to the Republican Convention