Is Barack going to catch Hillary?

Is Obama really within 3 points of Clinton in California, as the Rasmussen Poll shows? If so, it would be stunning. Almost all the other public polls have shown her with double-digit leads, but he's obviously coming up fast with his endorsements. In general, a point-and-a-half a day is about all any candidate can gain over a sustained period of a week or more, but with the primary four days away that gives Barack a chance to take it.
I'd be a little cautions, though. The Rasmussen poll was the only one that had Romney beating McCain in South Carolina the week before the election, and then he lost a five-point lead in that poll in one night of polling. That really shouldn't happen and it doesn't inspire confidence in the poll methodology.