GOP consultant Mitch Zak gave Brown two grades: an A "for the politics" (Brown has a higher approval rating than you would expect) and an "incomplete" on policy.
Perhaps Californians understand that Brown is doing the best job he can in a state that has made itself barely governable.
Or maybe voters are just good at blaming the GOP -- the minority party -- for Sacramento's dysfunction. As his governorship noted, "if you have certain adversaries who screw up and look stupid, it's very helpful."