Mexican officials and U.S. Customs and Border Protection are using a secret database to target journalists and advocates at the southern border. This week, On the Media speaks with a reporter on the list who was detained for questioning by Mexican authorities. Plus, what the Obama Library’s unique arrangement with the National Archives means for the future of presidential history. And, the grotesque origins of segregation. 

1. Mari Payton [@MariNBCSD], reporter at NBC 7 in San Diego, and Kitra Cahana, freelance photojournalist, on the secret government database of immigration reporters and advocates. Listen.

2. Tim Naftali [@TimNaftali], historian at New York University and former director of the Nixon Presidential Library and Museum, and Louise Bernard, director of the museum at the Obama Presidential Center, on the Obama Foundation's decision to curate its own presidential museum. Listen.

3. Steve Luxenberg [@SLuxenberg], author of Separate, on the history of Plessy v. Ferguson. Listen.

Music in this week's show:

Fallen Leaves by Marcos Ciscar 

Gormenghast by John Zorn

With Plenty of Money and You by Hal Kemp And His Orchestra

Let's Face This Music And Dance by Roy Fox And His Orchestra

Wade in the Water by Charlie Haden and Hank Jones

Get Back - Black, Brown And White by Big Bill Broonzy

Moulin Rouge by Toots Thielemans