The career staff of the Department of Justice Voting Section recommended that South Carolina’s voter ID law be cleared, but they were overruled by political appointees.
Furthermore, the DOJ has been stalling the ensuing litigation by filing absurd motions, like objecting to South Carolina submitting its brief in 12-point font instead of 13-point font. I am not making this up. This is presumably an effort to run out the clock until after the election, since the South Carolina law cannot go into effect without the approval of either the DOJ or a court.