There are differences within the European Union and within NATO in regard to how hard a line one should take with Russia, how much it should be a military focus, and how much a diplomatic focus. I think there's a unity around the security guarantee. No one knows what would actually happen if there was an attack on one of these countries, but I suspect that NATO would stand up to an actual attack.
The larger risk, as I've said, is not a military attack in that region, and frankly, to focus on that is a bit misguided. The statement has to be strong that the guarantee stands because that's the best kind of deterrent, but in reality the larger problem is whether there's the possibility of internal destabilization. I don't think it's a very realistic likelihood in Poland, but I think in some of the Baltic states that would be the bigger problem.