Research 2000 for Daily Kos (5/17-19, likely voters, 3/8-10 in parentheses):
Meg Whitman (R): 46 (52)
Steve Poizner (R): 36 (19)
Undecided: 18 (29)
(MoE: ±5.0%)
Jerry Brown (D): 46 (45)
Meg Whitman (R): 42 (41)
Undecided: 12 (14)
Jerry Brown (D): 47 (48)
Steve Poizner (R): 37 (33)
Undecided: 16 (19)
(MoE: ±4.0%)
Tom Campbell (R): 37 (33)
Carly Fiorina (R): 22 (24)
Chuck DeVore (R): 14 (7)
Undecided: 27 (36)
(MoE: ±5.0%)
Barbara Boxer (D): 47 (47)
Tom Campbell (R): 40 (43)
Undecided: 13 (10)
Barbara Boxer (D): 48 (49)
Carly Fiorina (R): 39 (40)
Undecided: 13 (11)
Barbara Boxer (D): 47 (49)
Chuck DeVore (R): 38 (39)
Undecided: 13 (12)
(MoE: ±4.0%)
Research 2000's new poll of California has, on the balance, good news for the Democrats. While Jerry Brown and Barbara Boxer aren't putting up dominant numbers, they're winning by decent margins (as opposed to the last Field Poll, which had them losing). Also good news: Steve Poizner is gaining on Meg Whitman in the GOP gubernatorial primary, as many other polls have shown; he may not get over the top by June 8, but will certainly leave her bloodied and much poorer. In the Senate primary, Tom Campbell, the toughest GOPer for Boxer to face, is putting a little distance between himself and Carly Fiorina (although the big gainer seems to be Tea Party fave Chuck DeVore, still back in third place).
http://www.swingstateproject.com/diary/6941/casen-cagov-dems-look-better-poizner-surges