Whom did Ronald Reagan defeat in the 1984 landslide, winning 49 states?

Whom did Barack Obama defeat in the 2012 presidential election? Whom did Donald Trump defeat in the 2016 presidential election? Whom did Joe Biden defeat in the 2020 presidential election? Whom did Donald Trump defeat in the 2024 presidential election? Whom did Ronald Reagan defeat in the 1980 election? Whom did Bill Clinton defeat in the 1992 election? Whom did Bill Clinton defeat in the 1996 election? Whom did John F. Kennedy defeat in the 1960 election?