It is welcome news that the Obama administration has reversed its irrational decision to try Khalid Sheikh Mohammed and four other 9/11 plotters in Manhattan’s federal court. So far, however, the administration has merely — and grudgingly — begun to climb out of this hole of its own making.The president seems more poised to move his error than to correct it. Reports indicate that the administration thinks the challenge now is to find a new location in which to proceed with the same ill-advised civilian prosecution. Instead, the idea at this point should be to build a sensible strategy going forward: military commissions for now, and, ultimately, a new system for handling national-security cases.No such luck. Rather than learn from this experience, the Left is doubling down on civilian due process. Its agitprop du jour is a bogus numbers game.