- Barbara Boxer (D) 50% [49%] (45%)
- Carly Fiorina (R) 42% [40%] (42%)
- Carly Fiorina (R) 50% [38%] (42%)
- Barbara Boxer (D) 38% [48%] (32%)
- Barbara Boxer (D) 81% [77%] (78%)
- Carly Fiorina (R) 11% [13%] (10%)
- Carly Fiorina (R) 86% [77%] (87%)
- Barbara Boxer (D) 9% [13%] (7%)
- Barbara Boxer (D) 56% [57%] (49%)
- Carly Fiorina (R) 35% [30%] (35%)
- Carly Fiorina (R) 78% [75%] (74%)
- Barbara Boxer (D) 16% [15%] (13%)
- Barbara Boxer (D) 85% [81%] (88%)
- Carly Fiorina (R) 8% [10%] (6%)
- Barbara Boxer (D) 48% [47%] (44%)
- Carly Fiorina (R) 45% [42%] (44%)
- Barbara Boxer (D) 55% [51%] (46%)
- Carly Fiorina (R) 37% [38%] (40%)
- Approve 46% [44%] (37%)
- Disapprove 46% [46%] (46%)
- Favorable 34% [28%] (22%)
- Unfavorable 42% [40%] (30%)
- Approve 46% [44%] (41%)
- Disapprove 40% [43%] (41%)
- Approve 53% [54%] (49%)
- Disapprove 42% [39%] (42%)
- Support 47% [52%] (45%)
- Oppose 42% [40%] (42%)