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

Rasmussen: Obama 51 (+1), McCain 45 (-1)
Hotline/FD: Obama 47 (nc), McCain 42 (+1)
GWU/Battleground: Obama 49 (+1), McCain 47 (nc)
Reuters/C-SPAN/Zogby: Obama 52 (+2), McCain 42 (nc)
ABC News/Wash. Post: Obama 54 (+1), McCain 43 (-1)
IBD/TIPP: Obama 46 (-1), McCain 42 (+1)
Gallup (Expanded LV model*): Obama 52 (nc), McCain 44 (+2)
Gallup (Traditional LV model*): Obama 50 (-1), 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.

Obama leads by 7.0 points in the RCP National Average