alternatehistory.com

http://en.wikipedia.org/wiki/Faithless_elector

As you may know, in the American political system, the people do not technically vote for the president, instead, there is the Electoral College. To simplify it, each state is assigned a certain number of electors, and the voters choose electors pledged to each candidate. However, an elector can vote for whoever they want, and occasionally there are so-called "faithless electors", who vote for candidates other than the one to whom they are pledged.

This is generally insignificant, as a single electoral vote the wrong way rarely matters, and faithless electors have never changed the outcome of a presidential election. Your challenge is to create a situation where they do.
Top