They have been spurred in part by DNA evidence made available in 1998, which almost certainly proved Thomas Jefferson had fathered at least one child with his slave Sally Hemings.

1998年公布的DNA证据在一定程度上刺激了他们，这些证据几乎可以肯定托马斯·杰斐逊和他的奴隶萨莉·赫明斯至少有一个孩子。