The other side of the border has been beefed up too. The US Department of Defence has ordered 1,500 additional active-duty troops there to tackle the national emergency declared by Mr Trump. Airborne surveillance has been ramped up to monitor Mexican gangs.

The leaders of Mexico and Canada have been willing to appease U.S. President Donald Trump to avoid tariffs on their products.

South Africa's Aldrich Potgieter shot 4-under-par 67 to maintain the lead through the third round of the Mexico Open on Saturday at VidantaWorld in Vallarta, Mexico. Potgieter is at 20 under for the tournament,

President Donald Trump suggested imposing tariffs on auto imports, threatening to drive up the cost of cars further amid plans for tariffs on steel, aluminum, Canada, and Mexico. But economists and the insurance industry say that this will raise auto insurance costs.

The Trump administration told Mexican officials that they should put their own duties on Chinese imports as part of their efforts to avoid tariffs threatened by President Donald Trump, according to people familiar with the matter.