Assistant to the president became a rank generally shared by the chief of staff along with the other most senior presidential aides such as the White House counsel, the White House press secretary, and others. This new system did not catch on immediately however. Presidents Kennedy and Johnson still relied on their appointments secretaries instead, and it was not until the Nixon administration that the chief of staff took over maintenance of the President's schedule. This concentration of power in the Nixon and Ford White House (whose last chief of staff was Dick Cheney) led presidential candidate Jimmy Carter to campaign in 1976 with the promise that he would not appoint a chief of staff. And indeed, for the first two and a half years of his presidency, he appointed no one to the post.