Nate Silver at FiveThirtyEight has produced an interesting series of charts showing the performance of the various Republican candidates on state and national polls since September 25th. Here are two of Silver’s charts. They tell much about the rise and fall of Cain and Gingrich. Take a look then click on the link to see the charts for the other candidates. Very helpful.
See the rest of Silver's graphs here: http://fivethirtyeight.blogs.nytimes.com/2011/11/11/the-gingrich-surge-has-come/