Are you kidding? If Pres. Bush went to Florida now, it would be seen to be taking advantage of a disaster for political gain, which is exactly what you're suggesting. There's no practical reason for him to go now, assuming he needs to go at all. He has declared the place a federal disaster area; all he needs to do is make sure the funds are made available quickly. Pres. Bush will go after the storm, and it will most likely be kept low key, so that he won't be accused of "ignoring" the victims, and at the same time not exploiting the situation for political gain.
but the point is, Kerry will go - so Bush has to.