Zelinsky certainly worries about ‘Ukraine fatigue’ taking hold in the west, tho’ as you say there is not much evidence of it yet. The ‘Freedom Caucus‘ in the House of Representatives have US withdrawal from arms supply as one of their aims. Currently they have no chance with this. UK remains committed, but France is a worry. Baltic States and Poland committed. Georgia has a force operating in Ukraine. We just have to remain vigilant and challenge any backsliding.I don‘t know a single person who has expressed that view to me in person in the last three months. I think the majority of people realise a line has been crossed and Russia now needs to be stopped.