[214]
Taft followed a weight loss program and hired the British doctor N. E. Yorke-Davies as a dietary advisor. The two men corresponded regularly for over twenty years, and Taft kept a daily record of his weight, food intake, and physical activity.[215]

Taft insisted that Charles Evans Hughes succeed him as chief justice.
At Hoover's inauguration on March 4, 1929, Taft recited part of the oath incorrectly, later writing, "my memory is not always accurate and one sometimes becomes a little uncertain", misquoting again in that letter, differently.[216] His health gradually declined over the near-decade of his chief justiceship. Worried that if he retired his replacement would be chosen by President Herbert Hoover, whom he considered too progressive, he wrote his brother Horace in 1929, "I am older and slower and less acute and more confused. However, as long as things continue as they are, and I am able to answer to my place, I must stay on the court in order to prevent the Bolsheviki from getting control".[217]
Taft insisted on going to Cincinnati to attend the funeral of his brother Charles, who died on December 31, 1929; the strain did not improve his own health. 