In 1904, Roosevelt made him Secretary of War, and he became Roosevelt's hand-picked successor. Despite his personal ambition to become chief justice, Taft declined repeated offers of appointment to the Supreme Court of the United States, believing his political work to be more important. Taft's federal judgeship was a lifetime appointment, and one from which promotion to the Supreme Court might come. Taft's older half-brother Charles, successful in business, supplemented Taft's government salary, allowing William and Nellie Taft and their family to live in comfort. Taft's duties involved hearing trials in the circuit, which included Ohio, Michigan, Kentucky, and Tennessee, and participating with Supreme Court Justice John Marshall Harlan, the circuit justice, and judges of the Sixth Circuit in hearing appeals. Taft told his military aide, Archibald Butt, that 'I am going to sit on the lid and it will take a great deal to pry me off'.