The quote in the title is what I'm told a Senator a few minutes ago just said with regard to Trump's wall.
An invisible wall? WTF? Maybe small children's invisible friends will be able to see it. LOL
LOL. Probably he meant increased security, though--don't you think.
If not, I love magic as much as the next guy.
I wouldn't presume to know what he meant by saying a wall may be invisible. The current crop of elected representatives, and the POTUS, have said so many things that (1) make no sense to begin with or (2) aren't at all what materialized, that what they don't say unequivocally but mean is no more reliable than is what they say explicitly and purport to mean. So it is too with what they say explicitly and don't mean. Accordingly, at this point one can only hear what they say and consider its merit on its own and see how long they hew to what one just heard them say.
At the moment, the Republicans have all the power -- Congress and the WH -- so it's they who must take the flack for saying stupid and/or unreliable things.