took control of the Senate for the first time since the 1950s, while Democrats retained control of the House of Representatives. Administration Reagan tapped James Baker, who had run Bush's 1980 campaign, as his first chief of staff. Baker, Deputy Chief of Staff Michael Deaver, and Counselor Edwin Meese formed the "troika," the key White House staffers early in Reagan's presidency. Baker quickly established himself as the most powerful member of the troika and the overseer of day-to-day operations, while Meese had nominal leadership of policy development and Deaver orchestrated Reagan's public appearances. Aside from the troika, other important White House staffers included Richard Darman and David Gergen. Reagan chose Alexander Haig, a former general who had served as chief of staff to Richard Nixon, as his first secretary of state. Other major Cabinet appointees included Secretary of Defense Caspar Weinberger, a former Nixon cabinet official who would preside over an increase in defense spending, and Secretary of the Treasury Donald Regan, a bank executive. Reagan selected David Stockman, a young congressman from Michigan, as the Director of the Office of Management and Budget. CIA director William J. Casey emerged as an important figure in the administration, as the CIA would figure prominently into Reagan's Cold War initiatives. Reagan downgraded the importance of the national security advisor, and six different individuals held that position during Reagan's presidency. Haig left the cabinet in 1982 after clashing with other members of the Reagan administration, and was replaced by another former Nixon administration official, George P. Shultz. By 1982, National Security Advisor William P. Clark Jr., Ambassador to the United Nations Jeane Kirkpatrick, and CIA Director Casey had established themselves as the major figures in the formulation of the administration's foreign policy. Shultz eventually emerged as the administration's most influential foreign policy figure, moving the administration towards a less confrontational policy with the Soviet Union. Baker and Treasury Secretary Regan switched positions at the beginning of Reagan's second term. Regan centralized power within his office, and he took on the responsibilities that had been held by Baker, Deaver, and Meese, the latter of whom succeeded William French Smith as attorney general in 1985. Regan frequently clashed with First Lady Nancy Reagan, and he left the administration in the wake of the Iran–Contra affair and Republican losses in the 1986 mid-term elections. Regan was replaced by former Senate Majority Leader Howard Baker. Judicial appointments