Excerpts of the President's News Conference
I think this report that I am to attend the Republican Convention, from what I have already said, and make an address there, you will see is exaggerated. There will be plenty of members at the Convention prepared, I have no doubt, to make sufficient addresses without calling me and my assistance.
Source: "The Talkative President: The Off-the-Record Press Conferences of Calvin Coolidge". eds. Howard H. Quint & Robert H. Ferrell. The University Massachusetts Press. 1964.
Calvin Coolidge, Excerpts of the President's News Conference Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/349049