http://www.swingstateproject.com/diary/5648/cagov-brown-beats-all-republicans-newsom-loses-to-allRasmussen (9/24, likely voters):
Jerry Brown (D): 44
Meg Whitman (R): 35
Some other: 3
Not sure: 18
Jerry Brown (D): 45
Steve Poizner (R): 32
Some other: 5
Not sure: 18
Jerry Brown (D): 44
Tom Campbell (R): 34
Some other: 6
Not sure: 16
Gavin Newsom (D): 36
Meg Whitman (R): 41
Some other: 5
Not sure: 18
Gavin Newsom (D): 36
Steve Poizner (R): 40
Some other: 6
Not sure: 18
Gavin Newsom (D): 36
Tom Campbell (R): 42
Some other: 6
Not sure: 17
(MoE: ±4.5%)
I certainly would have predicted that ex-Governor Jerry Brown was doing somewhat better than San Francisco mayor Gavin Newsom vis-a-vis their Republican competition, but I wouldn't have guessed the disparity was so great that Brown is putting up double-digit victory margins while Newsom is losing to all three Republicans... yet that's what Rasmussen is telling us. Brown wins by a margin ranging from 9 to 13, while Newsom loses by a margin ranging from 4 to 6. The differences in performance among the three Republicans -- all, superficially, moderate Silicon Valley types -- are negligible.
Rasmussen doesn't give us any primary numbers, but all polls of the primary so far have Brown up, although some by a narrow margin and some with a wide edge (although no polling has been done since Newsom scored a Bill Clinton endorsement). Ex-eBay CEO Meg Whitman has been accorded front-runner status on the GOP side, but it would be interesting to see if that's been affected by the recent pounding she's taken by the media over her almost-non-existent voting history. (In fact, it's worth noting that this sample was taken on the 24th, before the Sacramento Bee's story broke... and now the launch of Steve Poizner's new ad hammering on that point.)