These borders are not well protected with patrol guards and that's the biggest part of the problem.  Get more men on the border and I guarantee this problem goes away a lot faster.  But what we really need to be doing, as well, is adopting the same policy being used in Hungary.  Nevertheless, that still requires manpower in the right places at the right times.  We cannot simply rely on "fences" to do the job.

https://www.judicialwatch.org/blog/2018/05/arizona-border-ranchers-live-fear-illegal-immigration-crisis-worsens/