In June, the United States Supreme Court struck down a key formula of the Voting Rights Act. Section IV of the 1965 law required all or part of 15 states with a history of discrimination to seek approval from the Justice Department or a federal court before making any changes to their voting procedures.
Since then, some of those 15 states have moved to change how they run elections. Most recently, on Monday, North Carolina Gov. Pat McCrory signed a far-reaching election reform bill into law. The new law will require voters to present a valid photo ID at the...