Note that US was one of the 3 powers signing Budapest Memorandum, actively urging Ukraine to give up nuclear weapons in exchange for Ukrainian sovereignty and s

Note that US was one of the 3 powers signing Budapest Memorandum, actively urging Ukraine to give up nuclear weapons in exchange for Ukrainian sovereignty and security assurances. While this document doesn't oblige US to defend Ukrainian sovereignty, I don't think US is completely off the hook here either.