How did the founding fathers and constitution address the issue of slavery in america?

"Although many of the Founding Fathers acknowledged that slavery violated the core American Revolutionary ideal of liberty, their simultaneous commitment to private property rights, principles of limited government, and intersectional harmony prevented them from making a bold move against slavery. In his initial draft of the Declaration of Independence, Thomas Jefferson condemned the injustice of the slave trade and, by implication, slavery, but he also blamed the presence of enslaved Africans in North America on avaricious British colonial policies. Jefferson thus acknowledged that slavery violated the natural rights of the enslaved, while at the same time he absolved Americans of any responsibility for owning slaves themselves."