This is a really interesting poll from SurveyUSA. Of those Californian Republicans likely to vote today, the number one issue is the economy according to 31% of the respondents. The next most important issue is immigration at 29%. Iraq & terrorism - treated as separate issues - only add up to 23% combined.
And, among those who say immigration is the most important issue, Romney leads McCain by by 52% to 29%. That tells me that if Romney wins in California today it will be down to his stance on immigration as compared with McCain's. That surprises me. I hadn't considered the immigration issue to be that important.