Sen. Elizabeth Warren (D-MA) is welcomed to the stage by United Steel Workers International President Leo Gerard (L) during the Good Jobs Green Jobs National Conference at the Washington Hilton April 13, 2015 in Washington, DC. Sponsored by a varied coalition including lightweight metals producer Alcoa, the United Steelworks union, the Sierra Club and various other labor, industry and telecommunications leaders, the conference promotes the use of efficient and renewable energy and cooperation in updating the country's energy infrastructure. (Chip Somodevilla/Getty Images)
President Obama and left-leaning Democrats, like senators Elizabeth Warren and Bernie Sanders, are sparring over the president's trade initiatives, including the Trans-Pacific Partnership.
The critics say free trade hurts U.S. jobs, but President Obama says they've got their facts wrong. NPR's Scott Horsley joins Here & Now host Jeremy Hobson to set aside the politics and dig into what the trade deal would actually do.
