One of Donald Trump's 2016 Presidential Campaign promises was to build a border wall between the United States and Mexico.

The statement is true. During his 2016 presidential campaign, Donald Trump promised to build a border wall between the United States and Mexico. This promise gained significant attention and support from his supporters who believed the construction of a physical barrier would help curb illegal immigration and enhance national security. The proposed border wall became a key symbol of Trump's immigration policy and was a central theme in his campaign rhetoric.