SWING

"It is difficult to find a modern competitive presidential race that has swung so dramatically, so quickly and so sharply this late in the campaign. In the last 20 days, Sen. Barack Obama has gone from seven points down to eight points up in Florida, while widening his leads to eight points in Ohio and 15 points in Pennsylvania," said Peter Brown, assistant director of the Quinnipiac University Polling Institute.

No one has been elected President since 1960 without winning two of the three swing states of Florida, Ohio and Pennsylvania. See link for full article, very interesting.