Harry Truman actually said...

"This action by the United States will at least be a deterrent to the rulers of certain countries who consider genocide a justifiable means to promote their political objectives."

"I also regard speedy ratification of the Genocide Convention as essential to the effective maintenance of our leadership of the free and civilized nations of the world in the present struggle against ..."

"This tragic situation brings out the need for the free and civilized nations of the world to cooperate in outlawing this shocking crime of deliberate extermination of entire national, ethnical, racial..."

"That's just one of those wild rumors. I have no comment."