Excerpts of the President's News Conference
I don't think I can make any comment relative to the proposals of the French and German Governments for a security pact [the Locarno Agreements] for the guarantee of European peace. I don't know any way that America could cooperate in that. It seems to me that it is almost entirely a European political subject in which we can't take any very helpful part.
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/349091