Last week Pew Research Center produced an excellent report classifying voters into a number of groups. I've been encouraging people to read the report, as it has much to provoke thought about the different things that lead people towards their political views. Whether you are in the US or elsewhere, it is useful to understand how different people think.
C-SPAN interviewed Carroll Doherty from Pew about the report.
Further information and a link to the full report can be found here.