CNN: Obama maintains leads in key states

CNN is reporting new polls that show Barack Obama maintaining his lead in key states:

Nevada
Obama 51
McCain 46

North Carolina
Obama 51
McCain 47

Ohio
Obama 50
McCain 46

Virginia
Obama 54
McCain 44

West Virginia
McCain 53
Obama 44

CNN observes that McCain's attacks on Obama are missing their mark; voters remain unpersuaded by his accusations:

McCain's failure to move the needle in these four states likely reflects, in part, the fact that his latest attacks on Obama are not having much impact. Although a majority of voters in Virginia, Ohio and North Carolina had heard of Ayers and ACORN, less than a third of voters said such issues would affect their votes.

The polls were conducted between October 19 and October 21. Their standard errors ranged from 3.5 to 4 points.