Explainer: The Electoral College And Swing States

The U.S. presidential election is officially decided by the Electoral College, a body of representatives who vote according to the results of the popular vote in each state. For most states, the candidate who wins the popular vote receives all of that state's Electoral College votes. Polls ahead of the November 6 presidential election show that the results are fairly certain in most states, but a handful of states -- known as swing states -- could still go either way. (Next Media via Reuters)