The presumptive GOP nominee walks past half-submerged buildings, washed-out roads and thousands of sandbags holding back water in the southeastern half of the state Thursday afternoon.

Tells residents of Columbus Junction: “I know I speak for all of America. We’ll do everything necessary to try to rebuild the lives…”

He also praises volunteers who tried to help prevent worse damage.

Plus: President Bush conducts aerial tour of the damage, tells Iowans Congress is about to pass a “big chunk” of disaster money which will “help put people’s mind at ease.” Read remarks here.