President Donald J. Trump has often touted “major” statements. But this time he delivered. His announcement on Monday that he would send “top of the line” weapons to Ukraine and slap Russia with “severe” sanctions if it doesn’t agree to a ceasefire within 50 days marks a turnabout, especially for a man who only months earlier had bullied Ukrainian President Volodymyr Zelensky in the Oval Office. Significantly, the move was jointly announced with NATO Secretary-General Mark Rutte , who was in