Actually, it was Grant that "suggested" to Meade that Sheridan be unleashed to go raiding after Stuart's command. Sheridan had complained to Meade about the cavalry being restricted to screening and reconnaissance duties and boasted he could "whip" Stuart. When Meade reported the conversation (or complained about it) to Grant, Grant responded nonchalantly saying something to the effect; "If Sheridan says he can do it, why not let him?"