I don't know.
Both the Germans and the Japanese were working on their own and Russia wasn't really in any shape to do so at that point in the war.....
I don't think it would have done much except confirm to our enemies what our intentions were.....
Which is, of course, just as BAD as anything else.
Roosevelt was very woried about the work Germany had already done in this area. Our enemies, of course, would have known we were working on it, particulary since Fermi defected when he came here to accept the Nobel prize in physics. But today's reporters from the NY TIMES would certainly have given every detail possible had they been there.