Cindy Sheehan barely fits into her "campaign limo," her sister's blue Hyundai Tiburon. She ducks low to avoid hitting her head on the way in, and her knees are nearly at her chest when she sits, even with the seat rolled all the way back. Traveling over the Oakland Bay Bridge, her campaign manager at the wheel--steering with one hand and scrolling through e-mails with the other--the 6-foot-tall antiwar activist turned congressional hopeful tries in vain to stretch out in the passenger seat. It's raining when they pull into a parking spot near Berkeley City College, where Sheehan is about...