This is where the national daily tracking polls stand as of today:

Rasmussen: Obama 52 (nc), McCain 45 (nc)
Hotline/FD: Obama 50 (+2), McCain 43 (nc)
GWU/Battleground: Obama 49 (nc), McCain 46 (+1)
Reuters/C-SPAN/Zogby: Obama 51 (-1), McCain 41 (+1)
IBD/TIPP: Obama 46 (+1), McCain 42 (-2)
ABC News/Wash. Post: Obama 53 (-1), McCain 44 (+1)
Gallup (Expanded LV model*): Obama 51 (nc), McCain 44 (-1)
Gallup (Traditional LV model*): Obama 50 (nc), McCain 45 (-1)
(change since yesterday)

*Gallup's "Traditional" and "Expanded" Likely Voter models are weighted at 50%, so that the survey only counts once in the RCP National Average.

Overall, Obama leads by 7.6 points in the RCP National Average