Harry Truman actually said...

I believe that we should analyze the development of our present activities while the problems are fresh in the minds of the participants.

If they want to 'ball' themselves up, that's all right, that's their business, but they can't do that to me while I am in office.

I don't intend to investigate investigating committees.

The Senate committee has a right to work on anything that the Senate itself authorizes them to do.