General clark is right when he says, if we are afraid to act because of a nuclear threat, what will we do if he goes after the next country?
His use of nuclear force should not in any way prevent us from acting. He will use it if he wants to. That is his right and his decision. All we can do in that respect is have retaliatory capabilities ready and all the secret capabilities ready that will deny him the ability to launch as many as possible. Nuclear war is definitely winnable by the US, it always has been. US has always believed that and thats why they have all the things in place if it should ever happen. Obviously best avoided.
He also says that the future of the western world will depend upon Russia succeeding or failing here in Ukraine. I agree with this.