The Daily Caller reports Hungary built a border "wall" to keep out migrants trying to enter w/o permission, mostly from Muslim lands. Although it is primarily double fencing with sensors and backup patrols, it works. Illegal immigrants to Hungary are basically zero today.
People say Trump's wall won't work, the evidence in Hungary and Israel seems to contradict that viewpoint. Their walls work just fine. See the DC article for details.
We need to get the wall built along our southern border.
