The latest Ukraine reversal reveals a disturbing truth about the administration.

Sign up for the Slatest to get the most insightful analysis, criticism, and advice out there, delivered to your inbox daily. The Trump administration's clown car keeps sputtering along, impervious to speed bumps, red lights, fire truck sirens, and other warning signs of dangers and detours ahead. Take the latest mind bender: the on-again, off-again, on-again release-then-cutoff-then-release of U.S. weapons to Ukraine. Late last month, officials at the Pentagon signed an order halting delivery of a wide variety of weapons—including much-needed air-defense missiles—just as Russia was launching its most intense drone and missile volleys since the war began almost three…