An update on state polling on the Obama birth certificate myth — Public Policy Polling has released a preview of a new poll showing that 43% of Colorado Republicans think President Obama was not born in this country and an additional 24% were unsure. Those numbers are comparable to the numbers that PPP found in Virginia (41% no, 27% not sure) and North Carolina (47% no, 29% not sure) and much worse than those found in Utah (13% no in a poll conducted by local media), suggesting that birther-ism may be prevalent among Republicans in states outside of the South that lack large black populations.

Update 8/20 9:24 PM: Here are the full poll results (PDF).

(Cross-posted to Pollster.com)