I have my own system that accounts for Polling Bias, MSM Polls, Undecideds (3/4 to challenger), etc. Any poll can be corrected for using a consistent set of standards. Also you weight the poll by age...
Polling bias, Standard Procedure, to promote THE ONE, and convince us chances to rid ourselves are poor. It isn't. I am not as rosey as Dick Morris, but I am cautiously hopeful
I, too, have a system for accounting for poll bias. I don't always use it, but I look at it.
Please feel free to post your own analysis alongside mine for comparison.
-PJ