PPP is the most pro-Obama pollster this cycle. It constantly puts out polls showing Obama with a 10-point lead in battleground states such as OH. It also completely blew the PA primary showing Obama with the 1-point lead over Clinton, and we all know what happened afterwards.
Now, even PPPis showing an extremely tight race in Michigan.
Public Policy Polling (D) 7/23-27/08; 883 LV, 3.3% Mode: IVR
Michigan Obama 46, McCain 43 (June: Obama 48, McCain 39)