This week on Matter of Fact, Soledad O’Brien sits down with latinoTech CEO Elizabeth Vilchis about her work on an app designed to help reunite families separated at the Southern border. And it’s personal; at 7 years old, Vilchis was separated from her own parents when crossing into the United States. Then, Kimberly Reed is out with a new documentary, “Dark Money,” on the aftermath of the 2010 Citizens United Decision. She joins Soledad O’Brien for a discussion on the film and why disclosure is more important than spending limits. And, did you know there are undocumented Americans living in Tijuana, Mexico while working in San Diego?