Democrats best allies were the main source of slave trade.

And it still is going on today in East Africa, Central Africa, North Africa. WHY don't we ever hear of it? Because they are muslims, blacks and Arabs.
Today, muslim enslave christians and all non "believers", forbid education for women, and keep selling slaves.
In some cases it was a full-scale genocide. Entire tribes/ethnic groups were wiped out by castration and hardfship, an estimated 7 to 9 million perished, 17 million killed or deported that we knoiw of. Source: Tidiane N'Diaye Black African historian. https://youtu.be/_uwuE2jUezY