krauthammer: If fences don't work, why is there one around the White House?
If they don't work, why is it that the Israeli fence which separate Israel from the West Bank has cut down terror attacks within Israel by 99%. Fences work. Yes, there are parts of the border where you can't have a fence, fine. So you don't have it in those areas and you do heavy patrols. But there is no reason why a rich country like us cannot put a fence across -- a double fence, a triple fence and patrol it all the time. That would have a tremendous impact.
http://www.realclearpolitics.com/video/2014/07/01/krauthammer_if_fences_dont_work_why_is_there_one_around_the_white_house.html
...and as I have said before, the fence isn't there to keep you out. The fence is there so you know where the border is. The landmines, the snipers, the predator drone and the apache gunships are there to keep you out.
Liberals are like a "Slinky". Totally useless, but somehow ya can't help but smile when you see one tumble down a flight of stairs!