NATO has taken over coordination of Western military aid to Ukraine from the US, aiming to safeguard the support mechanism against President-elect Donald Trump. This move, which came after a delay, gives NATO a more direct role in the war against Russia’s invasion while stopping well short of committing its own forces. Diplomats acknowledge that the handover to NATO may have a limited effect, as the US under Trump could still deal a major setback to Ukraine by slashing its support, as it is the alliance’s dominant power and provides the majority of arms to Kyiv. The new Ukraine mission, dubbed NATO Security Assistance and Training for Ukraine (NSATU), is now fully operational.