I am well aware of the difference between topping and breaching. However, for a city like New Orleans, neither really matters. Like dixipixi said, when the wall of water's coming at you, you're not exactly debating the finer points here.
Here's the interview transcript, September 1, 2005:
http://mediamatters.org/items/200509020001
So, they're discussing the slow pace of aid, and the difficulties of sending aid to the flooded city. Putting Bush's statement into context, he is basically saying nobody anticipated the flooding, which was the result of the levees having been breached. Topping, breaching, it doesn't matter how it flooded, it flooded. Bush was told the water may top the levees, so therefore flooding should have been anticipated and planned for by him. In any case, Bush just made himself look like a complete moron on national television. Anyone with any sense knew that those levees might not have held, whether they broke or were topped. And you didn't have to live in N.O. to know it.
But you can go on supporting this guy. Fewer and fewer people are buying all the president's spin. Which really gives me the warm fuzzies. I know there will always be die-hard apologists such as you. I'm not out to change your mind, because no matter what the facts are, you will twist them to mean anything you want them to.