Eisenhower against the dropping of the A-bombs on Japan

[Reason]

I found this quote, can anyone verify it for me?

I am also interested in any other information that proves/shows that our dropping of the A-bombs on Japan was unnecessary.

"During his recitation of the relevant facts, I had been conscious of a feeling of depression and so I voiced to him my grave misgivings, first on the basis of my belief that Japan was already defeated and that dropping the bomb was completely unnecessary, and secondly because I thought that our country should avoid shocking world opinion by the use of a weapon whose employment was, I thought, no longer mandatory as a measure to save American lives. It was my belief that Japan was, at that very moment, seeking some way to surrender with a minimum loss of "face." The Secretary was deeply perturbed by my attitude, almost angrily refuting the reasons I gave for my quick conclusions."

(General Eisenhower, The White House Years, pp. 312-313).

Eisenhower was the supreme allied commander of the allied forces.

[Reason]

Admiral Leahy...
"It is my opinion that the use of this barbarous weapon at Hiroshima and Nagasaki was of no material assistance in our war against Japan. The Japanese were already defeated and ready to surrender because of the effective sea blockade and the successful bombing with conventional weapons.
"The lethal possibilities of atomic warfare in the future are frightening. My own feeling was that in being the first to use it, we had adopted an ethical standard common to the barbarians of the Dark Ages. I was not taught to make war in that fashion, and wars cannot be won by destroying women and children."
- William Leahy, I Was There, pg. 441.
Leahy was the Chief of Staff to the Commander in Chief, U.S. Army and Navy as well as The "Fleet Admiral" of the United States Navy.

Fleet Admiral, is a five-star flag officer rank and is the highest possible rank in the United States Navy.

[Reason]

General Douglas MacArthur...
MacArthur biographer William Manchester has described MacArthur's reaction to the issuance by the Allies of the Potsdam Proclamation to Japan: "...the Potsdam declaration in July, demand[ed] that Japan surrender unconditionally or face 'prompt and utter destruction.' MacArthur was appalled. He knew that the Japanese would never renounce their emperor, and that without him an orderly transition to peace would be impossible anyhow, because his people would never submit to Allied occupation unless he ordered it. Ironically, when the surrender did come, it was conditional, and the condition was a continuation of the imperial reign. Had the General's advice been followed, the resort to atomic weapons at Hiroshima and Nagasaki might have been unnecessary."
William Manchester, American Caesar: Douglas MacArthur 1880-1964, pg. 512.
Norman Cousins was a consultant to General MacArthur during the American occupation of Japan. Cousins writes of his conversations with MacArthur, "MacArthur's views about the decision to drop the atomic bomb on Hiroshima and Nagasaki were starkly different from what the general public supposed." He continues, "When I asked General MacArthur about the decision to drop the bomb, I was surprised to learn he had not even been consulted. What, I asked, would his advice have been? He replied that he saw no military justification for the dropping of the bomb. The war might have ended weeks earlier, he said, if the United States had agreed, as it later did anyway, to the retention of the institution of the emperor."
Norman Cousins, The Pathology of Power, pg. 65, 70-71.

[21st Century Republican]

I believe the dropping of the bomb was for the USSR.