By ending NATO expansion, the U.S. can still save Ukraine from the policy debacles of the past 30 years.

Source: https://original.antiwar.com/jeffrey_sachs/2023/10/04/beyond-the-neocon-debacle-and-towards-peace-in-ukraine/

Pressuring Türkiye over the NATO expansion is wrong and can trigger a counter move from Türkiye, Kalın said.

Source: https://www.hurriyetdailynews.com/us-should-find-a-formula-for-f-16-sale-to-turkiye-kalin-181887

Russia further singled out NATO expansion into Ukraine as especially provocative.

Source: https://original.antiwar.com/eisenhower_media_network/2023/05/16/the-us-should-be-a-force-for-peace-in-the-world/

So the NATO expansion is a fundamental factor here and it's been downplayed by the rationalizers of the war.

Source: https://therealnews.com/cornel-wests-presidential-candidacy-is-for-the-least-of-these