black president

While the right for white people to do pretty much whatever they want to blacks was literally in the CSA constitution, could the country be forced to change from a combination of internal and external pressure? If we assume that Richmond blinks on slavery in the 1880's, what events would need to...

Is the above scenario possible? This is when the Democrats don't turn neo-Dixie, e.g. Humphrey leading the Democratic Party, after Republicans signing Civil Rights in the scenario. Is this possible?