Primary elections are taking place today in Maryland, Nebraska, North Carolina, and West Virginia. In Maryland, there is the ultra-competitive (and ultra-expensive) race for who will take over Ben Cardin’s Senate seat after he retires. In West Virginia, Sen. Joe Manchin’s seat is on the line. Senior campaign and elections editor and chief polling analyst Steve Shepard walks Playbook co-author Rachael Bade through the races to watch and what they can tell us about the presidential election.All that, and the rest of the news you need to know today.