Apr 04 2019 But, so far, Trump and his team are holding firm in resisting doing so. He also said Trump's threat, if implemented, would undermine economic growth and prosperity, and provide little benefit in terms of security. President Donald Trump speaks during the 'White House Opportunity and Revitalization Council' meeting in the Cabinet room at the White House in Washington, U. President Donald Trump speaks during the 'White House Opportunity and Revitalization Council' meeting in the Cabinet room at the White House in Washington, U. On Thursday, he told reporters at the White House he wants to see Mexico stop more migrants at its southern border. Mexico understands that we're going to close the border, or I'm going to tariff the cars, he said.