There has been a lot of loose talk about how to deal with Russia over Ukraine. Some people think Obama should be, or sound, tougher – or more careful. Toughness is mostly about impressing the home audience, and getting people fired up. But it has nothing to do with what actually has to happen, what the choices or consequences are – it’s all about posturing. Foreign affairs is not a simplistic referendum on “toughness,” and the avatars of toughness should be laughed out of the public space.