Four of the Kennedy cabinet members Johnson inherited—Secretary of State Dean Rusk, Secretary of the Interior Stewart Udall, Secretary of Agriculture Orville L. Freeman, and Secretary of Labor W. Willard Wirtz—served until the end of Johnson's presidency. Moyers quickly rose into the front ranks of the president's aides and acted informally as the president's chief of staff after the departure of Jenkins. George Reedy, another long-serving aide, assumed the post of White House Press Secretary, while Horace Busby, a valued aide to Johnson at various points in his political career, served primarily as a speech writer and political analyst.