By David Lawder and Victoria WalderseeWASHINGTON/MADRID, March 3 (Reuters) - U.S. President Donald Trump said on Tuesday the United States would cut off all trade with Spain after the European country refused to let the U.S. military use its bases for missions linked to strikes on Iran."Spain has been terrible," Trump told reporters during a meeting with German Chancellor Friedrich Merz, adding that he had told Treasury Secretary Scott Bessent to "cut off all dealings" with Spain.