President Elect was first published for the Apple ][ in 1981, and was subsequently published for the Commodore 64 in 1984. A subsequent "1988 Edition" was released in 1987 for both those systems, as well as for the Atari ST and DOS computers. The 1988 Edition did not change gameplay at all, but simply added the historical Reagan vs. Mondale 1984 scenario, and a new 1988 scenario with no historical candidates. The game also added new playable candidates, such as Bill Clinton, Oliver North, Richard Gephardt, Geraldine Ferraro, and Jack Kemp.
Source: Wikipedia, "President Elect (video game)", available under the CC-BY-SA License.