In the final season of the TV show “24,” an idealistic president finds herself sacrificing her principles one by one in an attempt to preserve a “peace process.” She eventually manages to hammer out a flawed treaty, but can’t bring herself to sign it. In the real world, the Obama administration’s overly idealistic pursuit of a reduction in American and Russian stockpiles of nuclear arms has led it to actually sign a woefully flawed treaty. The goal may be worthy. The pact is not. The first major problem with the treaty: It would definitely reduce the number of American weapons,...