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 control, began to lose even more power as Gorbachev deepened political reform. The February Central Committee Plenum advocated multi-party elections; local elections held between February and March returned a large number of pro-independence candidates. The Congress of People's Deputies then amended the Soviet Constitution in March, removing Article 6, which guaranteed the monopoly of the CPSU. Soon after the constitutional amendment, Lithuania declared independence and elected Vytautas Landsbergis as Chairman of the Supreme Council (head of state). On 15 March, Gorbachev himself was elected as the first—and as it turned out, only—President of the Soviet Union by the Congress of