Headline: Trump says walls work. It’s much more complicatedLink: https://www.pbs.org/newshour/nation/trump-says-walls-work-its-much-more-complica…Publication Date: Wednesday, January 9, 2019Primary Source: PBS NewsHourNon-Cato Author: Gretchen Frazee and Joshua BarajasType: new media postFormat: New MediaNature of Mention: quotedScholar: Bier, DavidResearch Area: Immigration and Labor MarketsSubjects: President Trump's address on the border wall