Nordberg is correct.
"Eisenhower is also the only US president to have criticized the atomic bombing of Hiroshima and Nagasaki. Fearing the bombings would destroy the prospects for friendly post-war relations with Russia, at one point he advocated international control of atomic energy and turning the existing US stockpile over to the United Nations for destruction." (
https://thebulletin.org/2011/04/jap...ctive-eisenhower-and-atoms-for-war-and-peace/)
Dwight Eisenhower's view on using the Atomic Bomb
"In 1945 ... , Secretary of War Stimson visited my headquarters in Germany, [and] informed me that our government was preparing to drop an atomic bomb on Japan. I was one of those who felt that there were a number of cogent reasons to question the wisdom of such an act.... 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 second 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." (
http://www.nuclearfiles.org/menu/ke...iroshima-nagasaki/opinion-eisenhower-bomb.htm)