I'd say he took a pretty bad hit with the conservative base this week. These numbers will rebound in the next couple of weeks.
While what you say may be true, I myself am angry about Bush on spending and the borders, but if someone from CBS called to poll me, I'd tell them STRONGLY APPROVE because I'm not about the hand a weapon for the Bush hating media to beat him over the head with. And besides, other than these two issues I think Bush is doing a pretty good job. If he actually follows through on these promises to provide dollar for dollar offsets for the Katrina spending, then I'll be a pretty happy camper again.
Anyway, my guess is most Republicans would answer a poll the same way and not say they disapprove of Bush even if they're disenchanted over a few things right now. Nah, this is just CBS rigging the poll with far too many Democratic respondents again, just like the AP poll with 52% Democratic respondents when the actual voting population is 37% Dem.