By Marc A. Thiessen [Editor’s note: Once again, I regard some of what Thiessen takes to be bad as good just as I take some of what he regards as good as not. In this case, where I regard 3 (seperating children from their families at the border as having been his obligation to follow a law signed by Bill Clinton and enforced by Barack Obama overwhelmingly more often) as one more Democratic political ploy, 2 (his plan to pull out of Afghanistan) and 1 (his plan to pull out of Syria) as his wisest foreign…