I think the wall will be a wall alright. I don't know enough about walls to make proper judgement. Will it do it's job? Well, you can pass through concrete efficiently. Can you go over it? Probably.
If we don't need it, it sure isn't my job to tell the president of the united states that. If it isn't going to be made, I hope the resources spent talking about it is used to do something about illegal immigrancy.