Senior Adviser Larry Grisolano

Callie Shell / Aurora for TIME
Combined his Iowa common sense with his California cool to make cross-disciplined, complex choices about where and how the campaign should spend its money and time. So low-key and low-profile, he made Plouffe look like Paris Hilton, but within the campaign, no one doubted that the Griz was a vital part of the winning effort from the get-go.
Grade: A
See pictures from behind the scenes of Obama's campaign.
View the full list for "Mark Halperin's Final Campaign 2008 Report Cards"
Fashion Week in Pakistan
Top 10 Sesame Street Moments
Somali Refugees in Nepal: Stuck in the Waiting Room
Young and Uninsured: Cartoonist Julia Wertz
Stephen King on His 10 Longest Novels
Reagan's Speech That Ended the Cold War
The Weekly Acoustic News
The Rise of Manny Pacquiao