03/31/1947
https://www.presidency.ucsb.edu...
"During the war, this long-standing tendency toward economic concentration was accelerated."
"Thus, in my State of the Union Message in January, 1947, I said:"
"Since the end of the war, other matters, both foreign and domestic, have at times appeared to overshadow the monopoly problem, or at least have been the subject of greater public pre-occupation."
"The matter is being discussed in Paris and London now. I can make no statement on it at the present time."