Voters casts their ballots at ChiArts High School on March 15, 2016 in Chicago, Illinois. Voters in Illinois, Missouri, North Carolina, Florida and Ohio vote in primary elections today. Scott Olson | Getty Images

According to the New York Times, for every 10 U.S. adults, 6 vote and 4 don't. Rob Griffin, senior policy anayst at the Center for American Progress, and Jan Leighley, professor and author of "Who Votes Now?: Demographics, Issues, Inequality, and Turnout in the United States," explained to MPR News host Kerri Miller who is voting, who isn't, and what divides them.

To listen to the entire discussion, select the audio player above.