White House floats import tax amid tensions with Mexico

President Trump's push for a wall on the border has opened a diplomatic rift with Mexico. After Mexican President Enrique Pena Nieto announced he was canceling a visit to Washington, Mr. Trump gave no ground at a GOP retreat in Philadelphia. Congressional leaders said Congress would be willing to foot the bill for a wall for now. Lisa Desjardins talks to Judy Woodruff from Philadelphia.

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