What challenges does NATO face if the U.S. withdraws its support for Ukraine and reduces its security commitment to Europe?

NATO faces a significant crisis as the potential U.S. withdrawal from Ukraine support threatens the alliance's unity and effectiveness. Established in 1949 to counter Soviet threats, NATO now confronts the irony of losing American backing precisely when Russia poses the greatest security threat to Europe since the Cold War. This precarious situation forces NATO members to reassess their strategic options and consider alternative security arrangements, potentially fundamentally altering the decades-long transatlantic security framework that has underpinned European stability.