Robert Benchley (1889–1945), U.S. writer, humorist. Oral account of Gertrude Benchley, Robert's widow, via Peter Benchley, his grandson. Calvin Coolidge died in 1933.
While the first two lines of this exchange are fairly well known, the last line is not. The entire dialogue may be apocryphal, although the source is credible. Perhaps it is what Benchley, upon later reflection, wished he had said.