The presidency of Ronald Reagan began on January 20, 1981, at noon Eastern Standard Time, when Ronald Reagan was inaugurated as President of the United States, and ended on January 20, 1989. Reagan, a Republican, took office as the 40th United States president following a landslide win over Democratic incumbent President Jimmy Carter in the 1980 presidential election. The election was a realigning election, the "Reagan Revolution", that changed the trajectory of the nation. After winning a second term by decisively defeating Walter Mondale in the 1984 presidential election, Reagan set the tone for an era of American public discourse (through about 2009), the Reagan Era, in which the principles of American conservatism were advanced and came to dominate national policy making in areas such as taxes, welfare, defense, the federal judiciary, and the Cold War. Reagan was succeeded by his vice president, George H. W. Bush, who won the 1988 presidential election with Reagan's support.