Mikhail Gorbachev major campaign to limit alcohol consumption, which Gorbachev—who believed it would improve health and work efficiency—oversaw. His wife keenly supported the measure. As a result, crime rates fell and life expectancy grew slightly between 1986 and 1987. The reform had significant costs to the Soviet economy, resulting in losses of up to $100 billion between 1985 and 1990. Gorbachev later considered the campaign to have been an error. In April 1986 the Chernobyl disaster occurred; in the immediate aftermath, officials fed Gorbachev incorrect information to downplay the incident. As the scale of the disaster became apparent, 336,000 people were evacuated
Mikhail Gorbachev in the Soviet Union weakened, and centralized power from Moscow was unable to combat centrifugal forces in the South. In the elections, many Party candidates were defeated. Furthermore, Boris Yeltsin was elected as mayor of Moscow and returned to political prominence to become an increasingly vocal critic of Gorbachev. Gorbachev chose a vice president; but when first Shevardnadze, then Kazakh leader Nursultan Nazarbayev, turned it down, Gorbachev chose Gennady Yanayev, the head of the All-Union Central Council of Trade Unions and a known hardliner. This decision would come back to haunt Gorbachev later. In contrast to the controversy at home