This is WEEKEND EDITION from NPR News. I'm Lynn Neary. Primary races are picking up ahead of the midterm elections this fall. On Tuesday, voters in six states will go to the polls, making it one of the most important primary election days of the year.
Among the races to watch is a Tea Party challenge to Senate Minority Leader Mitch McConnell. To give us a lay of the land is NPR political editor Charlie Mahtesian. Charlie, welcome to the program.