Commentary The Biden administration seems to have thought it could scare the Russians away from Ukraine, so refused, on principle, to negotiate. The Russians were not scared off, and we and our allies (not to mention the Ukrainians) are without much of a policy. In fact, the Biden administration has failed to execute both a strategic and tactical policy to deal with the Ukraine problem and Russia in particular. First, a superpower shouldn’t make threats if you can’t back them up. The United States and NATO—who don’t agree on very much—do agree that no one will use military force to defend Ukraine. That means all the threats are economic and political. This is necessary, because America’s ability to defend Eastern Europe militarily is, to say the least, questionable. We have few ground forces, no in-depth defenses against Russian missiles and rockets, and little assurance that NATO can fight even if it …