“seek immediate United Nations Security Council action to provide assistance to Ukraine”
That’s the strongest language I see, and that obligation could be filled by just pushing for Ukraine’s defense in the Security Council.
I think the US has been unfairly reserved in its support of Ukraine. They should have given jets, permission to strike in Russia, and more a long time ago. But I don’t think they’re obligated by that memorandum to do even what they have.
More irresponsible than Nissan Altima or Dodge Ram owners isn’t easy