[CarrieLab]

I appreciate that he's drawing clear lines (aside from the generically "severe" consequences promised in response to Russia using nukes, which seems like sensible strategic ambiguity). Have to wonder what the game plan is if Russia does indeed use nuclear weapons. All options seems terrible.

[nradov]

The most likely option would be to pursue a more severe economic sanctions and isolation system, similar to how we treat North Korea. But while Putin is capable of anything, I think use of nuclear weapons is unlikely at this point in the war. Taking out a city wouldn't align with the propaganda that he's been feeding the Russian people. And the Ukrainian military forces are already dispersed enough that they don't make good targets.