I'll go with a slight variation: a 2012 election in which Hurricane Sandy occurred in 2011, and all the bad news stories of this year occurred (the Snowden leaks, the Obamacare website debacle, the gun control backlash) in 2012.
That would probably have been enough to get six point swings in Virginia, Florida, Ohio, Pennsylvania, Colorado, New Hampshire and Iowa.
Wisconsin and Nevada would probably be the equivalent of Florida, the states that don't decide the election but take the longest to call.