The 1980s saw major changes under President Ronald Reagan's presidency. Reagan implemented supply-side economics through tax cuts and reduced government spending. This led to economic recovery and lower inflation rates. However, Reagan also greatly increased defense spending and pursued an aggressive foreign policy against the Soviet Union, including the Strategic Defense Initiative. Reagan backed anti-communist groups in Central America, leading to controversy over Iran-Contra. He had mixed success in the Middle East and suffered humiliation after the 1983 Beirut barracks bombing. Reagan was re-elected in a landslide in 1984 but faced scandal over the Iran-Contra affair. However, he developed a strong relationship with the reformist Soviet leader Mikhail Gorbachev,