MAGA Republican immigration policy is no longer just a series of cynical‚ cruel‚ ill-considered‚ half-baked‚ ham-fisted‚ pig-headed political stunts‚ although it remains all of those things. It is now at the center of two serious-as-a-heart-attack threats to U.S. national security—threats that are themselves each potentially more grave than the chronic problems with immigration that are their ostensible cause. On Wednesday‚ Texas Gov. Greg Abbott announced that he would effectively ignore a...