No, it was a military decision made entirely by the only man authorized by the US Constitution to make such decisions in time of war: the Commander in Chief of the US Military, the President, Harry S. Truman. While he certainly consulted advisers, the final decision was entirely his alone.
To put such decisions up to a democratic vote would certainly severely cripple the ability of the US to fight in any war and would fully disclose to all our enemies our defense plans.
they were atomic bombs.
Hiroshima, Japan
The drop of the atomic bombs on Hiroshima and Nagasaki
the US decide to drop two atomic bombs on Japan, not china
In Hiroshima
sure?
Japan never dropped the atomic bomb on anyone. They did not have that technology.
No, the Japanese military did not drop any bombs on the USA after the atomic bombs were used on Japan. The bombs and pending invasion by the Soviets and the Americans (and allies) motivated the Emperor Hirohito to surrender to the Allied Forces.
They did not, it was the other way round.
Truman
Hiroshima and Nagasaki
If you are referring to WW2, then the US stopped using atomic bombs on Japan because Japan agreed to surrender. Had they not, the US had plans and production setup to drop a total of 23 atomic bombs on Japan in 1945.