McCain slips a point today, but still has a significant enough lead on Obama to claim the top spot.
These results, based on Sept. 8-10 polling, show McCain continuing to ride his post-convention bounce. He has held a statistically significant lead over Obama in each of the last four three-day rolling averages.
In addition, since Sept. 5 — the first night after the Republican National Convention — he has outpolled Obama in each of the last six individual night’s polling. That consistent pattern in the night-to-night data suggests that McCain has a stable lead for now.