Presidency of Ronald Reagan to forestall the possibility of an agreement between the United States and the Soviet Union. Nonetheless, both Gorbachev and Reagan agreed to continue arms control negotiations at the October 1986 Reykjavík Summit. At the summit, Gorbachev and Reagan closed in on an agreement to greatly reduce or eliminate the nuclear stockpiles of both the U.S. and the Soviet Union over a ten-year period, but the deal collapsed due to disagreements regarding SDI development. Reagan attacked Gorbachev in a 1987 speech delivered in West Berlin, but negotiations continued. Gorbachev and Reagan broke the impasse by agreeing to negotiate separate treaties on
Presidency of Ronald Reagan Regan with Howard Baker. The investigations into the Iran–Contra scandal continued after Reagan left office, but were effectively halted when President George H. W. Bush pardoned Secretary of Defense Caspar Weinberger before his trial began. Investigators did not find conclusive proof that Reagan had known about the aid provided to the Contras, but Walsh's report noted that Reagan had "created the conditions which made possible the crimes committed by others" and had "knowingly participated or acquiesced in covering up the scandal." Three different Soviet leaders died between 1982 and 1985, leaving the Soviets with an unstable leadership until Mikhail Gorbachev