Our airwaves are filled with debates about migrants, refugees, and undocumented immigrants... Who should be in the United States, who shouldn't, and who should decide? Immigration is, without question, a flash point in this year's political debates. It's an issue that seems to get to the core of who we are, who we want to be, and where we're headed as a nation. Today we're going to take a fresh look at the issue by exploring what history can teach us about the patterns and paradoxes of immigration in a nation of immigrants. It's one of a series of shows in the next few weeks that will speak to issues that have bubbled to the surface in politics this year, that reveal something about us — and human nature. Historian Maria Cristina Garcia joins us.