The tunnel measured over 4,000 feet long and included a rail system, electricity, ventilation and two elevators.

The wall is part of Trump's initiative to stop migrants from crossing into the U.S.

Texas has the largest section of the U.S.-Mexico border, most of it without fencing.

The Democratic-controlled House voted Tuesday to pass a $1.4 trillion government spending package, handing President Donald Trump a victory on his U.S.-Mexico border fence while giving Democrats spending increases across a swath of domestic programs.

Fisher Sand and Gravel Co. was awarded a contract Dec. 2 to build 31 miles of wall in Arizona, and had made a number of appearances on Trump’s favourite cable news channel — Fox News — talking about his desire to win a contract.

The administration has vowed it's only delaying the spending, not cancelling it.

Trump toured a section of the border wall in San Diego's Otay Mesa area. He was there before in March 2018 to see border wall prototypes that authorities later destroyed to make way for 22.4 kilometres of steel, concrete-filled bollards currently under construction.

What's a Montana farmer to do when 30-50 feral hogs just show up from Canada?

The U.S. president wants more than 700 kilometres of fencing along the nearly 3,218-kilometre border completed by the end of 2020.

One Democratic senator called the border wall money a "slap in the face to the members of the Armed Forces who serve our country."