Decades of writing about politicians has taught me that the successful ones generally do not make big decisions on the fly. If you watch and listen, you can usually spot a deliberative process and defensible reasoning behind their positions. But now comes a major exception: the decision by the Biden administration to throw open our southern border. Two years into this national disaster, I don’t have a clue about why the president and his team are still doing this. What started as a foolish bid to undo everything Donald Trump did has become a permanent policy that undercuts national security...