What are the major issues of border security?

How to best protect the U.S. from illegal immigrants and other security threats has been the center of political debate for the past few years. How best to handle the issue has been addressed by Republicans and Democrats. What are the major issues of border security? Please argue the issue of border security through either a conservative or liberal lens. Under what conditions might the evidence use to support the debate change?Please use these sources:https://www.youtube.com/watch?v=rxF0t-SMEXA&feature=emb_titlehttps://www.youtube.com/watch?time_continue=8&v=7W7JTKgYBRM&feature=emb_titleAnd Chapter 15 that I attached