The delegates at the convention strongly disagreed about the issue of slavery. Some delegates wanted to ban slavery on moral principle, while delegates from southern states argued that their economies depended on slavery. The southern delegates threatened to walk out of the convention if slavery were banned . What compromise did the two sides agree to? Congress would wait 20 years before voting on whether to ban the slave trade. Congress would not pass a tax on enslaved people. Congress would increase the number of slaves in the southern states. Congress would ban slavery in all states.