The slavery-reparations crowd is serious about raiding corporate America. That's the lesson to draw from what's happening to Wachovia Corp., the nation's fourth-largest bank, which says that predecessors to two companies it acquired in 1991 and 2001 once traded in slaves. It doesn't take a historian to see that Wachovia is being mau-maued. Wachovia and other companies are now discovering that giving to the slavery-reparations movement is a losing proposition. Two weeks ago Wachovia announced that First Union Corp., with which it merged in 2001, and the South Carolina National Corp., which joined it in 1991, had absorbed predecessor companies...