The open border policy is in place to provide what amounts to slave labor in order to prop up an economic system that could not otherwise stand. The United States' primary commodity has always been cheap sweat.
Nevertheless, if you don't have a border then you don't have a country. In addition to a high voltage fence, the US must construct a dedicated deportation route consisting of two strongly anchored points atop a slope between which is strung a large quantity of surgical tubing of a grade that may be tensioned and released several tens of million times. I do not support the proposed addition of decorative feathers to the ex-guest worker since this only serves to hinder the aerodynamic form which God and nature hath seen fit to impart him, although I would welcome a festive plumage on special occasions such as the cinco de mayo, La Dia de la Virgen de Guadalupe, and other culturally significant milestones.