Both trade and security are essential: Kudlow on Trump's threat to close border

White House economic adviser Larry Kudlow on Wednesday said both trade and security were essential as the Trump administration considers how it might make good on U.S. President Donald Trump's threat to shutter the U.S. border with Mexico. Kudlow, speaking at an event hosted by the Christian Science Monitor news outlet, said the administration was looking very closely at how to ameliorate any economic damage from a border closing.