Historians: Border Patrol agent's treatment of Haitian migrants recalls slavery-era whippings

Millions of people this week saw images of a uniformed U.S. Border Patrol agent charging his horse at a group of Haitian migrants clustered along the Rio Grande River. The agent appeared to be twirling his horse's reins like a lasso as Black men, women and children lugging food and water scrambled to get out of harm's way.

The scene drew outrage from Congress and the White House, culminating in the Department of Homeland Security temporarily suspending horse patrols on Thursday pending an investigation into border control practices.