True border security requires Congress to do two things.
First, pass comprehensive immigration reform to legalize the undocumented taxpayers who are already here and fully integrated within our communities, create a real worker visa program tied to actual labor market demand and decoupled from exploitive employers (which will prevent future undocumented migration by giving people a right way to come) and require greater due process in immigration proceedings.
Second, pass Medicare For All so every American has full access to mental health and addiction treatment to end the demand for drugs that is funding transnational criminal organizations that are sending drugs and refugees across our border. A thousand walls will not end America's demand for drugs or workers. A well regulated immigration system and Medicare for All is a much better investment of our tax dollars for consistent and stable border security.