What are Russia's demands regarding Ukraine's NATO membership and what implications does this have for European security?

Russia is demanding that the United States and NATO withdraw their 2008 commitment to bring Ukraine into NATO. This demand would effectively eliminate the deterrent that NATO membership provides against Russian aggression, as highlighted by Defense Minister Healey. The Europeans are concerned about potential unilateral negotiations between Putin and Trump that might sideline Ukrainian interests. There are questions about whether Ukrainian President Zelensky will even have input in these discussions, highlighting European fears of being excluded from critical security decisions affecting their region. European nations recognize they need to increase their defense spending and capabilities, with broad agreement on this necessity as they face the prospect of reduced American guarantees of their security.