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 civilization." Gorbachev and Reagan agreed to meet at the 1985 Geneva Summit, where they issued a joint statement indicating that neither the U.S. nor the Soviet Union would "seek to achieve military superiority." The two leaders began a private correspondence after the summit, and each became increasingly optimistic about arms control negotiations. Reagan's willingness to negotiate with the Soviets was opposed by many conservatives, including Weinberger; conservative columnist George Will wrote that Reagan was "elevating wishful thinking to the status of a political philosophy." Various issues, including intelligence operations performed by both countries and tensions in Germany and Afghanistan, threatened