>> the supreme court heard oral arguments wednesday in a challenge brought by shelby county, alabama to a key provision of the 1965 voting rights act. section 5 of that act requires states with a history of denying blacks the franchise re advanced permission from the justice department or a federal court before they make changes to their election law, such federal enforcement was responsible for sweeping away poll taxes and other obstacle to voting in the past. critics say it's no longer necessary. are they right? we're back with dan henninger and jason riley and wall street journal senior writer, colin levy joins the panel. colin, what is the core issue in this case? >> the core issue is that section 5 as you mentioned has historically had a successful way of equalizing, you know, basically black and white