Senate candidate Elizabeth Warren speaks Saturday in Boston. Ms. Warren is running against Republican incumbent Sen. Scott P. Brown, who is now considered the underdog because she has linked him with Republican goals for a Democratic state. (Boston Herald via Associated Press)

Senate candidate Elizabeth Warren speaks Saturday in Boston. Ms. Warren is running against Republican incumbent Sen. Scott P. Brown, who is now considered the underdog because she has linked him with Republican goals for a Democratic state. (Boston Herald via Associated Press)