If the latter, then we would be rebuffed once more when we claimed she created that wall. When pushed, the 'Rats would come back with another "but the wall was already there".
If the 'Rats can rebuff enough claims, then the force of further claims is weakened. We are dealing with smart lawyers here. They are playing chess here, not checkers. They will seek to take positions that will invite us to respond in ways they know they can rebutt.
And we are playing in the court of public opinion, with a main stream media that is heavily biased against us presenting our case.
I hope Congressman Weldon is good, as well as tenacious.
By definition, a wall is a BARRIER. And it was ANTI-useful to U.S. national security. While protective of the "liberties" of our foreign enemies who merely happened to already be on our shores.