FILE - In this Nov. 9, 2016 file photo, a Border Patrol vehicle drives by the border fence in Tecate, Calif., left, along the metal barrier that lines the border, seen from Tecate, Mexico. The Trump administration has proposed spending $18 billion over 10 years to significantly extend the border wall with Mexico. The plan provides one of the most detailed blueprints of how the president hopes to carry out a signature campaign pledge. (AP Photo/Gregory Bull, File)
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