Was the Constitution of 1787 a Pro or Anti Slavery document

The constitution of the United States was created with the intentions of a separation of powers, established to reconstruct the failing Articles of Confederation. The constitutional convention never clearly addressed the issue of slavery, but I feel that in context that it did address, and I think the constitution did support slavery. In article I section 9, it states that, “the migration or importation of such persons as any of the states now existing shall think …showed first 75 words of 479 total…

…showed last 75 words of 479 total…slavery is over African Americans will be considered citizens under the new constitution, and would have equal voting rights, instead they made their business to protect slavery, because the economy depended on free labor, and as I stated before they had the mine set that if you lose one “there is always more where that one came from”. So as you our country was build on slavery and the governing law, the constitution allowed it.