Trump’s tweets about DACA and migrant ‘caravans’ in context

After a weekend flood of tweets about immigration, President Trump on Monday declared that "DACA is dead." Lisa Desjardins puts the president's long-shifting stance on immigration policy in context and Judy Woodruff learns more about a group of Central American migrants who are making their way to the U.S. border from NPR’s Carrie Kahn, reporting from Mexico.