It might be time to start calling former Rep. Tom Campbell (R-Calif.) the early frontrunner in the California GOP Senate primary.

Campbell leads Carly Fiorina 33-24 in a new poll. The Research 2000 poll for the liberal website Daily Kos joins multiple polls now have shown Campbell beginning the race with a significant lead.

It's early, though, and Fiorina is likely to vastly outspend Campbell. We saw her campaign recently go after Campbell with the notorious "Demon Sheep" ad, and it has also accused him of having ties to terrorists.

It's also notable that Chuck DeVore, who is languishing in the single digits, recently told the AP that he has continued to focus his attacks on Fiorina because he views Campbell as the stronger general election candidate.

Campbell also performs best in the general election, trailing Sen. Barbara Boxer (D-Calif.) 47-43, while Fiorina trails her 49-40.

Fiorina and DeVore both show net-negative favorability ratings, while Campbell's approval (46 percent) is nine points higher than his disapproval (37 percent).