Are the presidential polls skewed?

[nomoon]

Here’s an updated chart showing the final polls from this morning. It’s similar to yesterday’s chart.

• Monmouth/SurveyUSA/Braun was added (tied, D+4)
• IBD/TIPP was added (Obama +1, D+7)
• ABC/WashPost changed its Democratic weighting advantage by 2 from +4 to +6, and not surprisingly, its Obama lead increased by 2, from +1 to +3. This was driven by a reported increase in expected Democratic turnout from 33 to 35, while the Republican turnout stayed at 29.
• Gallup (with a Romney lead of +1) was excluded from the graph because I could not find their party turnout numbers.
• Again, the CNN poll with an expected Democratic advantage of +12 seems very odd. Everyone keeps reporting the CNN poll as a D+11, though the numbers indicate a D+12 advantage. Maybe there's a round off error somewhere, or maybe an error in an initial report keeps getting propagated.