The withdrawal exacerbates existing tensions between European autonomy and transatlantic partnership. With 22% of Europeans viewing the U.S. as a rival or adversary, alternative security frameworks are gaining traction. Germany's Lithuanian brigade deployment and France's nuclear posturing reflect a continent seeking self-reliance.

However, without U.S. backing, Europe risks fragmentation. The withdrawal threatens to tip the balance in NATO's favor for Russia, as reduced American forces weaken deterrence capabilities. Smaller allies like Lithuania face heightened vulnerability, relying on Germany's growing military footprint to counterbalance Moscow's influence.

The U.S. nuclear umbrella remains a critical but fraying pillar of stability.