What are European concerns about potential US troop withdrawal under President Trump?

Europe is deeply concerned that President Donald Trump may scale back or completely withdraw American troops from the continent, particularly from the Baltic states where the US currently maintains over 5,000 soldiers. This possibility has sent shockwaves across Europe as NATO faces its greatest test amid the ongoing war in Ukraine. Trump's willingness to consider withdrawing forces from Estonia, Latvia, and Lithuania is especially alarming for European security. With Europe standing at a geopolitical crossroads, there's growing anxiety about the future of the NATO security pact and whether the US might abandon its commitments at a critical moment when Russia poses an increasing threat.