No matter how good a polling firm is, it will begin to suck once a partisan webiste hires it. Take PPP. Nate Silver called PPP out for disappearing a poll they conducted because they didn't like the results.
Nate Cohn has called PPP's methodology flawed.
In the Florida election yesterday, PPP predicted a Democratic victory. The Republican won. This would be no problem if the proportion of wrong-winners PPP had picked in the past had not been Democrats.
They are Democrats.
In Presidential elections, PPP is awesome. But some elections are not Presidential.
It could be that Congressional elections are given little attention, and PPP feels as if it can suck at predicting Congressional elections without anyone noticing.
It is clear that Markos does not want a pollster who simply tells Kossacks what they want to hear. That's why Research 2000 was fired. PPP tells Kossacks what they want to hear, intentionally or not. It's time to fire PPP.