This chart should add some perspective. People who claim Bush's approval has dropped "sharply" in x number of days thanks to the news coverage need to be smacked upside the head.
Although the chart shows declines from the peaks of 9/11 and the Iraq war, the declines are quite consistent and can be traced in almost straight lines. Indeed, following the straight post-war line, Bush's approval should be averaging 58% on or about today, July 10. The fact that this poll shows 59% and it's the low of the last 3 polls (67%, 60%, 59%) may be a sign that Bush's approvals are beginning to stabilize.
The bottom line is that we should assume a softening in the approval rating over the next few months. This is a product of the perfectly normal and predictable waring off of the statue falling, not day-to-day events.