David Gleeson and his partner Mary Mihelic assembled 52 cinder blocks near the edge of Jacumba Hot Springs, Calif., a border town about 70 miles southeast of San Diego.
Apparently, Gleeson and Mihelic also took to heart Trump's promise to make Mexico pay for the wall.
They sent an itemized bill for $14,635.42 to Mexican President Enrique Peña Nieto, because the wall was "made in the USA."
They said that they hope others will be inspired and add to the project.