A new CNN/Time/Opinion Research survey in California shows Sen. Barbara Boxer (D) holds a slight edge over challenger Carly Fiorina (R) among registered voters in the U.S. Senate race, 48% to 44%. Notes pollster Keating Holland: "In a battle between two women, female voters will be a key constituency. Right now, 48 percent of women would pick Boxer compared to 43 percent for Fiorina.