Japan would not surrender.. Truman was not going to fight a war on both sides of the US.. Atlantic and Pacific. They didn’t surrender with the first one dropped.. It took 2. It was horrible, but Truman saved American lives by stopping Japan.
Your statement is so false and jumbled that it isn't even wrong. Nevertheless, let me try to untangle and debunk it:
Truman was sworn in as president on April 12, 1945. At that time, America was still at war with Germany (the Atlantic side) and still at war with Japan (the Pacific side). Germany surrendered roughly a month later. Meaning that Germany had already been knocked out of the war by the time (thank goodness!) the A bombs were dropped.
(Most of WWII was fought by the U.S. under the leadership of Roosevelt, not Truman - and it was fought mercilessly on both sides of our country - though the European theatre was given priority.)
So I don't understand what the hell you are trying to say.
Regards,