It’s like a micro Camp of the Saints dry run, a direct challenge to our national sovereignty. They have to be repelled, even at cost of killing them right there on the border in full view of the world’s media. But my guess is they will stop if they see Marines and armored vehicles on the other side of the fence instead of just empty desert or a few Border Patrol vehicles. They know the mass tactic is effective against outnumbered BP agents who will just try to catch them, but the odds aren’t so good against Marines who will shoot them if they rush the border. The fecklessness (and in some cases treachery) of past administrations seems to be bringing us to a point of forced choice.