The latest comments by the US president come despite Kyiv repeatedly rejecting ceding the peninsula.
Archived version: https://archive.is/newest/https://www.bbc.com/news/articles/c20z20kyvxxo
Disclaimer: The article linked is from a single source with a single perspective. Make sure to cross-check information against multiple sources to get a comprehensive view on the situation.
NATO is a military organisation which is led by the United States. The war started from expansion threats by NATO against Russia; or in other words, the war is NATO vs. Russia.
As NATO is and long has been led by the USA, the Commander-in-Chief of the USA speaks for them.
(As for why, if it’s NATO vs. Russia, NATO haven’t gone all-in? Because they could very easily start World War III that way, and no one is very keen on doing that.
Oh, and also because they don’t give a fuck about East Slavs.)