While he’s all but assured the Democratic nomination, Jerry Brown technically has some challengers in June. The California Chamber of Commerce launched a new ad — but don’t call it an anti-Brown ad. Brown may not have the dollars to be on the air as much as Meg Whitman, but he does have the advantage of being the sitting attorney general. And in that role, he can call Hollywood-driven press conferences to get his face on the news. Get the latest California political headlines as they happen. Follow PolitiCal on Twitter.