second, President Biden must immediately lift all restrictions on Ukraines use of American weapons against military targets in Russia. This policy change is long overdue. Article 5 of the United Nations Charter gives Ukraine the right to self-defense. We must retire the strange logic that Russia can attack Ukraine from anywhere within Russia, but Ukraine cannot strike back. Fears of escalation, including Russias use of tactical nuclear weapons, prompted concerns about lifting the ban. However, the probability of such an escalationwhich, in my view, was always lowis now even lower given Trumps victory in the U.S. presidential election. There is absolutely no way Putin is going to use a nuclear weapon against Ukraine just weeks before Trumps return to office. Therefore, there is no downside to lifting this constraint today. https://t.co/Zs6cmpwd1o.