California: Boxer 43, Campbell 41

A month ago, Boxer posted a 45% to 41% lead over Campbell.

Two other Republican hopefuls, former Hewlett-Packard CEO Carly Fiorina and State Assemblyman Chuck DeVore, remain within striking distance, but their numbers worsened very slightly this month.

Boxer now leads both Fiorina and DeVore by 46% to 40% spreads. Four percent (4%) opt for another candidate, and roughly 10% are undecided.