Department of Homeland Security Secretary Alejandro Mayorkas is touring facilities at the southern border as the latest migrant encounter numbers show a drop after President Joe Biden's executive action went into effect. Meanwhile, new reporting indicates over 400 migrants have been smuggled into the U.S. by groups affiliated with the Islamic State group, a report that Mayorkas says is inaccurate. Correspondent Ali Bradley joins "NewsNation Now" with the latest. #BorderReport #ISIS Anchor Elizabeth Vargas delivers the biggest stories, without bias or opinion. Watch "Elizabeth Vargas Reports" every weeknight at 6p/5C on NewsNation. #VargasReports NewsNation is your source for fact-based, unbiased news for all America. More from NewsNation: newsnationnow.com Get our app: trib.al/TBXgYpp Find us on cable: trib.al/YDOpGyG How to watch on TV or streaming: trib.al/Vu0Ikij