about abraham lincoln and his core amendment. if the southern men wanted to maintain economic institution of slavery, they went along with the amendment and what lincoln said is that if the south would agree to the tax increases that the north was proposing, that congress would never have the ability to write an amendment to end the economic institutional slavery. >> hang on one second. >> let me finish my thought. >> i'm not cutting you off. >> that's what you're doing. >> i'm cutting you off because i need to take a break. we'll come back and discuss more. we're back in a moment. ♪