What concerns exist about US troops in Europe under President Trump?

There is growing concern that President Donald Trump may scale back or entirely withdraw American troops from Europe, particularly from the Baltic states where the US currently maintains over 5,000 soldiers. Trump's willingness to consider withdrawing forces from Estonia, Latvia, and Lithuania has sent shockwaves across the European continent. European officials view this potential withdrawal as a major security risk, as it would significantly reduce NATO's military presence in a region vulnerable to Russian influence. The possibility of reduced American military commitment has prompted anxiety among European leaders about their collective defense capabilities and the future of transatlantic security cooperation.