A wall is key to any reform

Of course it will be ugly. So are the concrete barriers to keep truck bombs from driving into the White House. But sometimes necessity trumps aesthetics. And don't tell me that this is our Berlin Wall. When you build a wall to keep people in, that's a prison. When you build a wall to keep people out, that's an expression of sovereignty. The fence around your house is a perfectly legitimate expression of your desire to control who comes into your house to eat, sleep and use the facilities. It imprisons no one.

Charles Krauthammer