Unworkable isn’t the same as impossible. You can build anything if you have a mind to do so. It’s unworkable because no sane person would do it, and if an insane person tried, sane people would stop them before they finished the insanity.
I’ve explained why multiple times. Others have explained it as well. Perry is Governor of the state, and understands the border, and he knows it is unworkable to build a fence on the border.
I’m betting most poeple don’t even know what the border looks like, and think there is some straight line on some map where they could build a fence. Others want to give up water rights to a foreign country, and think that is a perfectly reasonable thing to do.
Of course, once you think it’s OK to take the life of one of God’s creations simply because they crossed your border, I guess pretty much anything goes.
Charles, read what I wrote and stop acting like a liberal.