Executive Order 13767

Executive Order 13767, titled Border Security and Immigration Enforcement Improvements, was issued by United States President Donald Trump on January 25, 2017. The order directs a wall, colloquially called the "Trump wall", to be built along the Mexico–United States border. On December 22, 2018, the federal government went into a shutdown due to Trump's demand for $5.6 billion in federal funds to begin work on the wall. By January 12, 2019, the shutdown became the longest budget shutdown in U.S. history.

The wall was a central presidential campaign promise. Trump repeatedly pledged that Mexico would "pay for that wall" and on many occasions falsely asserted that it was doing so; in fact, Mexico never contributed anything to wall construction, and the Trump administration steered millions of dollars in U.S. taxpayer money to wall construction, diverting funds from the military construction budget and other sources. The Trump administration sought $18 billion in funding.

In late 2017 the Department of Homeland Security paid about $3 million for the construction of eight prototypes near San Diego, California, with local taxpayers spending about $2.3 million in security. In November 2017 SWF Construction won an $18 million contract to replace an existing 2-mile wall in Calexico, California. Construction began in February 2018.

The executive order was revoked by Trump's successor, President Joe Biden.