Podcast aims to air the unknowns about Trump’s business.

The fact that President Trump also owns a vast business empire is a first for the U.S. A new investigative effort called "Trump Inc." explores his dual roles as commander in chief and chief executive. William Brangham talks with Andrea Bernstein of WNYC and Eric Umansky of ProPublica about their reporting and how they invite listeners to help fill in the blanks.