US President Donald Trump is unlikely to try to withdraw the US from the transatlantic alliance, and the US Senate could legally block him from such a step if he changed his mind. But his 1 May announcement that the US would withdraw 5,000 of the 36,000 American troops stationed in Germany over the next 12 months, a few days following Iran war criticism from German Chancellor Friedrich Merz, has further raised alert levels across the continent.
