Summary: Tuesday on the NewsHour, we report from the U.S.-Mexico border, where migrant arrivals are straining resources and dividing communities on how to respond. A look at bipartisan legislation that could force TikTok's chinese parent company to sell or face a nationwide ban. Plus, a look at how the illegal trafficking of high-caliber guns from the U.S. is helping to fuel the gang violence in Haiti. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
