More from the NBC News/Wall Street Journal Poll

Overall: Obama 52, McCain 42.Led wi

Believe Palin is qualified? 55% no, 40% yes

Palin favorables: 38% positive, 47% negative.

Concerned McCain will continue Bush policies: 23%

Concerned Obama is too inexperienced: 23%

Race an important factor? 8% yes. Of those: 4% less likely to vote for Obama, 2% more likely.

Age an important factor? 22% yes. Of those: 18% less likely to vote for McCain.

Powell endorsement's impact: 77% no difference, 19% more inclined to vote for Obama, 4% less inclined.

On issues: Obama +39 on health care, +21 on economy, +14 on taxes. McCain +5 on Iraq.

On traits: Obama +30 on hope and optimism, +20 on right temperment. McCain +4 on stronger leader.

Obama's voter enthusiasm: excited 52%, satisfied 33%

McCain's voter enthusiasm: excited 26%, satisfied 34%