The UN General Assembly is due to vote Tuesday on a non-binding resolution demanding “an immediate humanitarian ceasefire” in Gaza — a call that the paralyzed Security Council has so far failed to make. The United States, one of only five permanent members of the Security Council, used its veto on Friday to halt a draft text calling for a ceasefire, the latest sign of impasse. The Council took more than a month after the start of Israel’s war on Gaza to speak with one weak voice, calling in mid-November after four rejected texts for humanitarian “pauses” in the conflict. UN Secretary-General …