Daily Kos is suing Research 2000, its former pollster. Daily Kos founder Markos Moulitsas made the announcement on the liberal blog today.
According to Moulitsas, several statistics experts examined poll data compiled by Research 2000, and these individuals concluded that the results were fabricated. Moulitsas says that Research 2000 defrauded Daily Kos.
Dissenting Justice has also criticized Research 2000 poll results. For example, in February 2010, Daily Kos/Research 2000 produced a survey that purports to demonstrate extremism among Republicans. The results, however, are flawed in several respects. See Major Flaw with Daily Kos Poll on Republican Ideology: No Context.