Greg Grandin on "The End of the Myth: From the Frontier to the Border Wall in the Mind of America"

As the Senate appears poised to pass a resolution to overturn President Trump's national emergency declaration to build a wall along the southern border, we speak with historian Greg Grandin about his new book, "The End of the Myth: From the Frontier to the Border Wall in the Mind of America." Grandin writes in his book, "The wall might or might not be built. But even if it remains only in its phantasmagorical, budgetary stage, a perpetual negotiating chip between Congress and the White House, the promise of a two-thousand-mile-long, thirty-foot-high ribbon of concrete and steel running along the United States' southern border serves its purpose. It's America's new myth, a monument to the final closing of frontier. It's a symbol of a nation that used to believe that it had escaped history, or at least strode atop history, but now finds itself trapped by history, and of a people who used to think they were captains of the future, but now are prisoners of the past." Greg Grandin is a professor at New York University and a Pulitzer Prize finalist.